Fantasy Baseball Breakouts or Fake Outs? Hitters Delivering Elite Results For Week 12

June 16, 2026

Andy analyzes hitter fantasy baseball sleepers, breakouts surging for Week 12 of 2026. Are they true breakouts, or fake outs? Read his fantasy baseball outlooks and buys/sells.

Welcome, RotoBallers, to another edition of our Fantasy Baseball Breakouts or Fake Outs series. Every week, we spotlight four hitters who are beginning to turn the corner at the plate and determine if they can sustain this hot surge.

This week, we will spotlight a recently promoted player in Cincinnati who is beginning to look like his former self, as well as a post-hype breakout outfielder in Milwaukee, among others.

Be sure to follow RotoBallerMLB on X for all of our league-winning content and me, @A_Smith_FS, for any questions! Additionally, be sure to use the discount code SMITH at checkout for 50% off any Premium Packages. Note: All advanced statistics referenced are updated as of Monday, June 15.

Colt Emerson, 3B/SS, Seattle Mariners

24% Rostered (Yahoo!)

Seattle Mariners top prospect Colt Emerson was on the radar of many drafters during spring training. The former 22nd overall pick from the 2023 MLB Draft was in strong contention to break camp with the MLB roster. While he was unable to begin the campaign in Seattle, it did not take him long to reach the MLB club.

Emerson spent 38 games with Triple-A Tacoma before earning the call and posted a solid .255/.347/.469 slash line with eight doubles, seven home runs, and 10 stolen bases. While he struck out at a high 46 times (27.2% of the time), his five-category potential made him a top stash candidate in all standard leagues.

Emerson eventually made his MLB debut on May 17 and has been a staple of the Seattle starting nine ever since. Over his first 23 games in the big leagues, Emerson has posted a .237/.310/.566 lien with an .876 OPS. He has already gone deep six times and added five doubles. While he has yet to showcase any of his raw speed (zero stolen bases), managers should expect this number to gradually climb as he gets more adjusted.

However, what puts Emerson in this column is his recent play. Over the last two weeks of action (last 13 games), Emerson has quietly been one of the game's top power hitters, carrying a .244/.295/.659 line with five of these six total long balls.

Can managers trust this power surge over the remainder of the campaign?

While the sample size is relatively small (in the majors), we have ample professional data to analyze. So far, Emerson has not generated the most impressive hard-hit metrics but has instead relied on an optimized swing. Through just under a month of MLB action, Emerson has generated a low 30.6% hard-hot rate with a modest 6.1% barrel rate.

His .159 xBA and .275 xSLG suggest that not only has Emerson overperformed his current production, but he could be hit with significant regression if he does not generate harder contact.

However, despite not impacting the ball "that" hard, the infielder is still tapping into his raw power upside. He has been able to do this through his elite Pull AIR%. The 20-year-old has generated a well-above-average 22.4% Pull AIR% with a low 38.8% ground-ball rate. While managers should expect this number to gradually regress as he sees more plate appearances, Emerson is hitting the ball effectively, offsetting his lower hard-hit marks.

Colt Emerson evens the score with his second home run in as many games 💥 pic.twitter.com/Evc9MtNLc2

— MLB (@MLB) June 13, 2026

For reference, at Triple-A this season, Emerson generated a much higher 49.5% ground-ball rate with a 40.2% Pull% (compared to the 46.2% Pull% he holds in Seattle).

The other concern about Emerson's profile is his high whiff tendencies. He currently holds a hefty 31.0% whiff rate and a 29.6% K% in the big leagues, which is neatly identical to the27.2% K% he held at Triple-A back in April.

Verdict: 

While his profile suggests regression could come and hit him hard, managers in all standard formats should look to pick up Emerson where available. Despite his high whiff tendencies, Emerson is making highly impressive contact with the ball, which is notable for a 20-year-old. Growing pains are inevitable, but the young infielder is showcasing enough upside that it is worth rostering even if he is best kept on your bench during a cold stretch.

Kody Clemens, 1B/2B/3B/OF, Minnesota Twins

 19% Rostered (Yahoo!)

Sitting just under the 20% rostership mark is Kody Clemens of the Twins. Clemens put together a solid season for fantasy last summer, hitting 19 home runs, but was a liability in batting average, carrying a low .213 AVG. However, Clemens has not only become a more stable hitter but has also found another level of untapped power upside in 2026.

Through 60 games this season, Clemens has posted a .251/.317/.483 slash line with 19 long balls, 14 doubles, and has even chipped in six stolen bases. Is this a sign of a late-career breakout?

When looking at his marks last season (over a career-high 112 games), Clemens showed solid progress after seeing sporadic playing over his first three MLB seasons. Last summer, Clemens generated a 12.0% barrel rate (the highest of his career at the time) with a .243 xBA and .465 xSLG, suggesting he should have seen better results in the box score.

Additionally, he generated a 48.3% hard-hit rate with a 109.9 mph max exit velocity and a 35.9% LA Sweet-Spot%, both of which made the best marks in his MLB career.

As expected, some of this positive regression began to show in 2026 production. His current .251 AVG is in line with his "expected" mark from the previous season and his current underlying .248 xBA. Clemens has also generated a .447 xSLG with an even higher 13.6% barrel rate (86th percentile) and a .333 xwOBA, which also marks a career high.

Even while raising his barrel rate from the previous summer and tapping into more of his raw power, the 30-year-old has lowered his K% (24.1% - 22.1%) and maintained nearly the same walk rate (7.5% - 6.7%).

However, there may even be room for more untapped upside. During the 2025 campaign, Clemens generated an elite 23.2% Pull AIR%, but this mark dropped slightly to 19.4% in 2026. If Clemens can return to his +20.0% range, and paired with his higher barrel rate, we could be looking at a potential 25+ HR bat.

Verdict: 

Clemens has made the proper strides in not only hard-hit rates but also his generate contact (higher xBA and lower K%) to suggest he could put on another breakout season. His multi-positional eligibility on Yahoo makes him a great addition to all standard leagues.

Garrett Mitchell, OF, Milwaukee Brewers

10% Rostered (Yahoo!)

Let's pivot to a name for those in deeper leagues. Garrett Mitchell is a former top-20 pick from the 2020 MLB Draft, but has never carved out a full-time role in the majors until this season. The injury bug has always limited his opportunities, but so far in 2026, Mitchell has been a reliable force in the starting nine (against right-handed pitching).

Entering the 2026 campaign, Mitchell appeared in just 141 games (from 2022 through 2025) and posted a .254/.333/.433 line with 13 home runs and 23 stolen bases. His five-category potential made him a worthwhile name to take in the final rounds of deeper five-outfielder leagues, but playing time was not fully guaranteed.

However, Mitchell has since become the primary center fielder on the strong side of a platoon that has occasionally seen opportunities against opposing southpaws. Over 59 games, Mitchell has held a .246/.349/.406 line with a .755 OPS. Mitchell has gone deep only four times but has swiped six bags.

Since June 1, Mitchell has taken his production up a notch, carrying a stellar .308/.341/.564 lien with a .906 OPS. When looking at the underlying marks, this recent surge suggests that not only can Mitchell remain a viable fantasy asset going forward, but he also possesses real upside.

Through just over two months of action this season, Mitchell has generated elite underlying marks that suggest his power product could soar in the second half. Per Baseball Savant, Mitchell has generated a 92.4 mph average exit velocity (91st percentile), 14.5% barrel rate (89th percentile), and a 491.% hard-hit rate (87th percentile).

He has also generated a 95th percentile bat speed with a solid .339 xwOBA. While his .238 xBA is not overly high, his hard-hit metrics suggest his low home run count should see massive positive regression in the coming weeks.

MIL - Garrett Mitchell 2-run HR (4)

📏 425 ft | 💨 105.8 mph | 📐 25°
⚾️ 77.7 mph knuckle curve (PHI - RHP Aaron Nola)
🏟️ Out in 28/30 parks

PHI (3) @ MIL (2)
🔻 4th#ThisIsMyCrew pic.twitter.com/23duY9sNKc

— MLB Home Runs (@MLBHRs_) June 14, 2026

The other component of his profile that should begin to increase is his speed. Despite drawing walks at a high 13.0% rate and placing in the 97th percentile in sprint speed, Mitchell has only stolen six bags. Over 43 career games at Triple-A. Mitchell stole 16 bags. There is still a 20/20 profile in his skill set, and his underlying marks suggest this could be the year he finally breaks out.

While his below-average 8.2% Pull AIR% does hinder his overall upside, his hard-hit marks, paired with his high-end on-base skills and raw speed, should make Mitchell a priority target on the waiver wire.

Verdict: 

Managers should expect his batting average to be a "weakness" in his fantasy profile, but not many outfielders on the waiver wire possess true 20/20 upside. Those looking for an impact bat with elite raw speed should look to pick up Mitchell before the pot-hype breakout continues.

Noelvi Marte, 3B/OF, Cincinnati Reds

35% Rostered (Yahoo!)

The final player we will spotlight is a hitter who was recently re-promoted to the major league roster. Marte had an inconsistent 2025 season, finishing with a .263/.300/.448 slash line with 14 home runs, 10 stolen bases, and was viewed as a borderline top-12 3B entering 2026 drafts.

However, Marte endured a rough start to the season, which ultimately led to his demotion to Triple-A Louisville. Over his first 11 games, Marte would go 4-for-29 with no extra-base hits before joining the top club in the minor leagues. At Triple-A, Marte quickly found his swing, posting an elite .369/.409/.575 line with eight home runs and nine stolen bases over a 40-game stretch.

Since rejoining the Reds, Marte has looked just as comfortable and is quickly putting himself back on the fantasy radar. Through a short nine-game sample, Marte has gone 8-for-26 with a double, two home runs, three stolen bases, and a 5:2 K:BB. While the sample is not enough to fully declare him a "re" breakout, does Marte have the skill set to re-emerge as a valuable fantasy option?

So far in June, it appears Marte's recent surge at the plate is not a "fluke." As shown in the visual below, when facing all three pitch types, Marte is not only enjoying success on the surface-level stats but also boasts similar marks in the "expected" category, suggesting that he is not benefiting from batted-ball luck.

Managers should not overly concern themselves with his overall Baseball Savant profile, as much of this is heavily skewed towards his cold start. His low .229 xBA, .401 xSLG, and .297 xwOBA should gradually climb given his success in June.

When looking at his profile last season, Marte did not need to generate "high-end" hard contact to find success. He placed in the 50th percentile for barrel rate (9.1%) and was well below average in hard-hit rate. However, two facets kept his fantasy value high, especially in category leagues.

Marte ranked in the 89th percentile in sprint speed (and is on pace to surpass that mark, with a 93rd-percentile sprint speed this season) and generated an above-average Pull AIR%. Playing in a hitter's paradise in Cincinnati, Marte's strong 17.6% Pull AIR% allowed him to flirt with a near 20-HR season despite having modest hard-hit metrics.

If Marte can continue to optimize his swing, he could find even more success given his higher sprint speed and rising walk rate (4.4% - 6.8%).

Verdict: 

While the risk in his profile is still evident, given his slow start to the season and high 25.4% K%. However, managers looking for a potential 15/25 candidate for the remainder of the season should not wait to pick up Marte off the waiver wire.

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