Fantasy Baseball Breakouts or Fake Outs? Hitters Delivering Elite Results For Week 10

June 2, 2026

Kevin analyzes hitter fantasy baseball sleepers, breakouts surging for Week 10 of 2026. Are they true breakouts, or fake outs? Read his fantasy baseball outlooks and buys/sells.

We've finally flipped the calendar to June! Who's who in Major League Baseball this year is starting to seem really clear, but that doesn't mean we can't get you another edition of Fantasy Baseball Hitter Breakouts or Fake Outs. Diamonds in the rough are always out there. While most are worth taking a chance on, you want to know they're real so that you're not falling for fool's gold.

This is where we come in and help you out by using a bevy of advanced stats to dig in and find out whether hitters are getting lucky or not. I've said it before, and I'll say it again, xwOBA rules all, and xwOBACON just makes me want breakfast again.

With that said, let's dive into another group of hitters that are breaking out. This week, we'll evaluate a quartet of hitters - Spencer Horwitz, Jorge Mateo, Tristan Peters, and Curtis Mead. All statistics in this article reflect games played through Monday, June 1st.

Spencer Horwitz, 1B, Pittsburgh Pirates

2026 Stats: .858 OPS, 140 OPS+, 7 HR, 26 RBI, 24 R, 1 SB, 19% Rostered (Yahoo!)

In a surprisingly stout Pirates lineup, it can be hard to stand out next to guys like Oneil Cruz, who can obliterate the ball at a moment's notice. But Horwitz has quietly been one of Pittsburgh's best hitters. His 140 OPS+ ranks second on the team behind only Brandon Lowe.

Over the last 14 days, he's been cruising to an OPS of 1.029 with a solid mix of both average and power. The 28-year-old has shown flashes of efficiency before, so is this actually a breakout? Or are we looking at a fake-out? Let's take a look under the hood.

Spencer Horwitz sends this ball WAY OUT of the park for a leadoff homer 🏴‍☠️ pic.twitter.com/1CILi3oxwX

— MLB (@MLB) May 30, 2026

First off, we'll start with the plate approach as we always do. His strikeout rate in 2026 is down to 11.5% after being at 17.8% last season. That 17.8% number was already respectable, so 11.5% is just ridiculously good, especially if you make good contact with the ball.

Cue the old infomercials that always said, "But wait, there's more!" That's because his walk rate is up to 13.9% from last season's 10.7%. He's clearly got a fantastic eye for the zone and is finding ways on base one way or another. That's a really solid combo to get things started here.

Now for the batted ball profile. He's coming in with a 42.5% ground-ball rate, up from last year's 38.4% mark. He was at 42.7% in Toronto in 2024, so I'm not considering this raise problematic, as that season resulted in a 123 OPS+, so he can be productive this way.

The fly-ball rate is essentially the same as last year, coming in at 41.8%. His line drive rate is suffering a bit, dropping to 15.7% from last year's 20.5%. It'd be ideal if some more of those grounders could convert into line drives, but other than that, I don't have many worries here.

The HR/FB rate is coming in at 10.9%, up from last year's 9.2%. It's always good to see an increase, but this number is still a bit below league average.

His BABIP is currently coming in at .295 and tells us that when it's in play, he's not exactly getting lucky or unlucky. So far, the results he's getting seem pretty true! But let's head to Baseball Savant and see if there's anything over there that'd say otherwise.

Currently, Horwitz's .378 wOBA is paired with a .336 xwOBA. While the xwOBA is still in the 64th percentile, that's quite a bit of negative regression. It's being driven by a low hard-hit rate (19th percentile) and a sub-par barrel rate (34th percentile). While he's doing a lot of very positive things in relation to his eye for the zone, it's evident that much better contact is going to be needed here to stave off that negative regression.

As we look at the pitch mix that pitchers face him with, it's a pretty intriguing top three. He sees four-seamers the most and is actually expecting positive regression on the pitch (.361 wOBA, .379 xwOBA). That's also a really solid floor that's much more indicative of his current production level.

First pitch CRUSHING 😤

Spencer Horwitz wasted no time! pic.twitter.com/8wjmHhPRWY

— MLB (@MLB) May 24, 2026

The pitch he sees second-most is sinkers. He's hitting them for a solid .398 wOBA, but it's paired with a .359 xwOBA. It's a solid drop of negative regression, but with him only seeing them 14.9% of the time, I don't think much of that regression will affect his overall profile. The pitch he sees the third-most is changeups, and those results have been true, posting a .333 wOBA alongside a .332 xwOBA.

Where I think most of the negative regression is going to come is with breaking balls. He's demolished curves and sliders so far, but is clearly overachieving. Curves have a .465 wOBA to go with a .371 xwOBA, while sliders have a .511 wOBA paired with a .302 xwOBA. These combine for 19.3% of all pitches he sees. While I'm not as concerned with a drop in production from sinkers, the floors here are simply too far away from the current numbers to ignore.

At the same time, that's an incredibly solid floor against curves. Horwitz will be much more pedestrian against sliders in the future, but curves are going to be a pitch he demolishes.

One pitch he's going to continue struggling against is sweepers. He's currently hitting them for a .100 wOBA to go along with a .174 xwOBA. With the growing popularity of sweepers and pitchers' reliance on them, he's going to see them more often.

Verdict: While I'm pretty happy overall with what I'm seeing from Horwitz's plate approach, he's clearly below where he needs to be with contact. The batted ball profile isn't bad, but I think he's achieving above what he should be this season, and we're probably going to see him level out closer to his 2024 levels when all is said and done.

That doesn't mean he's a sell, though. A player with a 120 OPS+ certainly has worth on your roster. His walk rate is going to keep him on base, and the power behind him with Lowe and Cruz will give him more fantasy value as he's likely to score more runs going forward, especially with him batting leadoff more recently. At 19% rostered in Yahoo! leagues, he should be snatched up off the waiver wire. So get him if you can, but don't plan on being overly reliant on his production going forward.

Jorge Mateo, SS, Atlanta Braves

2026 Stats: .876 OPS, 149 OPS+, 4 HR, 11 RBI, 22 R, 7 SB, 9% Rostered (Yahoo!)

If you've watched Mateo hit at all this season, you'll be shocked to learn who he was before coming to Atlanta. A career 81 OPS+ guy is doing this type of damage in the Braves lineup? No way those numbers can be real.

But he's crushing it. After some struggles, Ha-Seong Kim opened the door, and it's been Mateo taking advantage of his opportunity. So what do we make of this? Is he a breakout or a fake out?

A no-doubter for Jorge Mateo! 😤#BravesCountry pic.twitter.com/UVvmvFuiYI

— Atlanta Braves (@Braves) May 31, 2026

Let's start with the plate approach. He's clocking in with a 27.4% strikeout rate and a 6.0% walk rate. Neither of those numbers is superb, but the strikeout rate is a massive improvement over his 36.1% rate in 2025. That number was a bit of an anomaly, though, as he's generally found himself within the 23%-27% range.

The batted ball profile is showing a solid decrease in ground-ball rate, dropping to 41.8% after being at 46.9% last season and 43.4% the season prior. He hasn't posted a rate this low since 2022. That effort to keep the ball off the ground hasn't resulted in more fly balls, but it has resulted in an increase in line drive rate (21.8% vs 14.3% last season).

Though it's a small sample size, we're seeing a 20.0% HR/FB rate for Mateo this season. That's a spectacular mark and is well above who he's traditionally been. With more time, it's likely he creeps back into a number closer to his 10% norms, but for now, he's been excelling in that area.

As for his BABIP, it's a bit high as we would expect for a high line drive rate guy. It's at .404 this season. He has traditionally been a sub-.300 BABIP type of guy, so we're likely seeing a bit of luck here. The extra line drives help us to assume it will stay above .300, but a .400 level just isn't sustainable for anyone.

As we head to Baseball Savant, though, they're thinking the drop-off may not be all that steep. He's got a .383 wOBA that's paired with a .371 xwOBA. If he were a qualified hitter, that would rank in the 84th percentile, similar to Rays teammates Yandy Diaz and Junior Caminero.

His hard-hit rate and barrel rates are certainly helping to keep that xwOBA as high as it is. His hard-hit rate of 48.2% would rank in the 85th percentile, while his barrel rate of 12.5% would rank in the 78th percentile. These two numbers actually track very closely to what Caminero's doing this season.

ATL - Jorge Mateo Solo HR (2)

📏 407 ft | 💨 112.2 mph | 📐 24°
⚾️ 92.1 mph four-seam fastball (COL - LHP Kyle Freeland)
🏟️ Out in 30/30 parks 💣

ATL (3) @ COL (1)
🔺 2nd#BravesCountry pic.twitter.com/HVkS9MUAze

— MLB Home Runs (@MLBHRs_) May 3, 2026

So that gives us confidence that the xwOBA isn't over-estimating him as much as we'd assume. At the same time, he's well above the normal levels he's posted in his career (.283 xwOBA, 5.7% barrel rate, 35.6% hard-hit rate). So not getting ahead of ourselves is paramount here.

As we look at the pitch mix, I love what I'm seeing out of the top two pitches. He sees four-seamers and sinkers the most, and pitchers should probably switch that up on him ASAP. He's hitting four-seamers for a .580 wOBA (.534 xwOBA) and sinkers for a .391 wOBA (.388 xwOBA). Despite the fact that the sample size is still a bit small, it's great to see that he's getting such great production and the results aren't funky.

The rest of his pitch mix is a bit wonky and hard to trust, but that's to be expected when you've only stepped to the plate 84 times this year.

Verdict: It's no secret that Mateo is crushing it, but the question remains where he's going to level out. Based on his history, I'm not expecting a 149 OPS+ to be his norm, even if xwOBA says he's an upper-echelon pitcher. I would assume it ends up closer to the 110-115 mark as pitchers start to make adjustments against him.

The other thing to consider here is that his playing time was a bit scattered prior to taking over for Kim this week. 25% of his PAs this season have come over the last week, so if he starts to slump, we could see playing time change. That's a cause for concern. But at 9% rostered, you still should be picking him up and riding out the hot streak. If this turns into a permanent role, then you'll be feeling very good about your decision-making.

Tristan Peters, OF, Chicago White Sox

2026 Stats: .761 OPS, 113 OPS+, 2 HR, 14 RBI, 18 R, 4 SB, 1% Rostered (Yahoo!)

How many young left-handed bats do the White Sox have these days? It's like an endless line of production with a ton of options to choose from. Peters is the latest White Sox hitter who's crushing it, hitting for a 1.034 OPS over the last two weeks.

The White Sox have had plenty of questions about whether they're real or not this season, but let's focus just on Peters. Is he a breakout? Or a fake out?

TRISTAN PETERS 😤@WhiteSox take the lead! pic.twitter.com/0FB2XBgSsl

— MLB (@MLB) May 17, 2026

Starting with his plate approach, he's coming in with a 19.4% strikeout rate alongside a 7.5% walk rate. He only got four games in the majors with Tampa last year, so we'll compare this to his minor league rates. Those were generally around 18% for his strikeout rate and 11% for his walk rate.

That tells us there may be a little bit more in the tank when it comes to his walk rate, but given he's in his rookie year, the lesser numbers are expected. As far as I see it, he's seeing the zone very similarly to how he did in the minors.

His batted profile looks pretty solid as he's got a 40.6% ground-ball rate, 34.7% fly-ball rate, and a 24.8% line drive rate. That's very similar to the numbers he posted in Triple-A Durham with Tampa Bay last season, so we're seeing consistency here too.

There are a couple of bits of worry that I see, though. His HR/FB rate is at 5.7% this season and is largely consistent with who he's been in the minors. The long ball won't be a specialty of his.

He also has a 20% infield fly-ball rate. That's also been consistent for him through the minors, so when the ball's in the air, there's a good chance it's not going all that far. He's excelling through contact hitting and line drives, it would appear.

Given the high line drive rate, a high BABIP shouldn't be a surprise either. It's coming in at .358 through his first 56 games. He was at .306 in Durham in 2025 and was at .280 in 2024. Based on that, I'd expect he regresses closer to the league-average .300 mark as the season progresses.

Now for his Baseball Savant page. His .341 wOBA is paired with a .291 xwOBA that ranks in the 20th percentile. Quite simply put, that's not what you want to see.

Backing that up is a 25.2% hard-hit rate (3rd percentile) and a 4.3% barrel rate (19th percentile). This confirms a lot of worries that we had with the high BABIP and the high infield fly-ball rate. When it's not a line drive, it's generally soft contact.

With xwOBA projecting negative regression, it shouldn't be surprising that we're seeing the same thing in his pitch mix. He's been decent against four-seamers (.316 wOBA) but is set for negative regression against them (.297 xwOBA).

Changeups have been the pitch he's best against (.397 wOBA), but he is also expecting negative regression (.316 xwOBA). A league average floor isn't bad, but that's a decent drop.

Breaking balls have been a weakness of his, and I'd expect that pitchers turn to sliders and curves a lot more often as they adjust to the 26-year-old.

Verdict: Contact hitters have a place in lineups and can find ways to be very successful. But we're not looking at someone like Luis Arraez here. Peters has been hitting the ball too softly for me to feel any bit comfortable with when projecting his long-term value.

At 1% rostered, I was hoping that there was a diamond in the rough here. But unfortunately, it looks like we're dealing with some fool's gold. Plenty of better options are going to be out there on the waiver wire for you that don't have a bunch of negative regression coming for them.

Curtis Mead, IF, Washington Nationals

2026 Stats: .851 OPS, 142 OPS+, 8 HR, 25 RBI, 26 R, 3 SB, 28% Rostered (Yahoo!)

If you're not paying attention to the Nationals, then be sure to keep your head on a swivel. Their offense has been one of the best in baseball through two months. You know all about James Wood and CJ Abrams, but keep an eye out for what Mead's doing.

His 142 OPS+ is one of the best on the Nationals, and he's been getting a lot more playing time since Brady House got demoted to Triple-A Rochester. He's clearly taking advantage of his situation, but is he a breakout or a fake out?

2 run home run from Curtis Mead off Lucas Giolito, and it's 2-1 Nationals over the #Padres in the first pic.twitter.com/T9nnQRcs6K

— Carlos (@LFGPads19) May 29, 2026

Starting with his plate approach, and I'm loving what I see. He's got a 16.7% strikeout rate to go along with a 14.1% walk rate. Forget that solid strikeout rate; his walk rate is in the 88th percentile.

I say it every week, but I haven't said it in this article yet, but walks are so important when it comes to a hitter's ability to keep getting on base while they're in slumps. It makes it easier to snap out of it, and Mead is excelling at a really high rate here.

His batted profile has one solid area of improvement this year. That's his fly-ball rate, which is up to 47.2% from last year's 42.7%. But his ground-ball rate is also up to 39.6% from 37.1% in 2025. That's all resulting in a decrease of line drives (13.2% vs 20.2% last year).

For Mead, the good part is that the line drives are turning into fly balls instead of ground balls. He's punishing them when he gets them in the air, posting a 16.0% HR/FB rate.

That's much improved from any number he put up before, with his career high being 4.2%. Is he overachieving here? Potentially, but much of that will be determined by his hard-hit rate and barrel rate. More on those later!

As we look at his BABIP, we see there may be some opportunity here. That's because his .245 BABIP that he's posting right now is well below what he's done in past seasons. Each of his past three seasons has resulted in a .300 BABIP or higher. Now his lower BABIP is likely also a result of more power and more homers, but there's still a big of opportunity here for positive regression.

Now to see what Baseball Savant says. His .375 wOBA is paired with a .371 xwOBA, so we're looking at some pretty true results out of the 25-year-old. That xwOBA ranks in the 84th percentile, giving us a really solid hitter here.

As for his contact, his hard-hit rate ranks in the 75th percentile, while his barrel rate ranks in the 71st percentile. Tie in that excellent walk rate, and it makes sense why his xwOBA has such a solid floor.

Curtis Mead in his last 12 games started:

⚾️ 14-for-42 (.333)
⚾️ 4 doubles
⚾️ 2 home runs
⚾️ 7 walks
⚾️ 6 RBI / 11 runs

He has now reached safely in 11 of the 12 games. pic.twitter.com/o1zPYvR4Zc

— Nationals Communications (@NationalsComms) May 23, 2026

Looking at this pitch mix that pitchers attack him with, and there's just a lot more to love. He sees four-seamers and sinkers the most, with sinkers having quite a bit of positive regression coming (.322 wOBA, .367 xwOBA).

That's nothing compared to sliders, though. He's only hit them for a .242 wOBA, but that's paired with a .356 xwOBA. He only sees them 12% of the time, but if you're giving me 100 points of positive regression on the pitch, he sees third-most, then that's something I'm absolutely getting behind.

As you go down the rest of the list, there aren't really any other major weaknesses. The lowest floor he has on any pitch (outside of slurves, which he's seen just once) is a .328 xwOBA. He's getting solid contact on each pitch and is very well-rounded.

Verdict: The only thing that could hold Mead back here is any reduction in playing time. But with how hot his bat's been, I don't think there's any chance the Nationals would want to make any changes. With the option of playing first, third, or DH, he's going to have options to stay in the lineup.

There's a great chance he's on your waiver wire, and you should absolutely snag him up. He's a buy and looks like he's going to be a solid piece of this Nationals lineup going forward. Get him while you can.

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