Fantasy Baseball Prospects With The Best Hit Tools - Top Rookie Breakout Candidates (2026)

March 9, 2026

Jarod's top fantasy baseball prospect breakout candidates, sleepers with the highest-rated hit tools. His rookies to target that can have big 2026 impacts.

There are plenty of exciting young prospects in today's game, and this year, more so than in recent years, there seems to be more than a few who have yet to make their MLB debut who appear ready to help fantasy teams from the onset of the regular season. In this article, we're going to take a look at four prospects who could be ready to contribute on Opening Day or shortly thereafter.

For this exercise in particular, we want to look at prospects with the best hit tools, so we're focused on prospect hitters who have/are:

• Future Value (FV) hit tool of 60 or better
• Overall scouting grade of 50 or better
• Ranked inside MLB.com's Top 100 Prospects List
• ETA of 2026

You can also check out Eric Cross's Top 50 Fantasy Baseball Prospects list for ETAs on when some of the brightest young players will get a call-up and check out his top-25 prospects for 2026 redraft leagues. Let's take a look at the prospects with the best hit tools, who all happen to be shortstops by trade, with three of the four being left-handed hitters as well. All ADP referenced is taken from NFBC drafts as of February 15.

• Fantasy baseball draft kit
• Fantasy baseball rankings
• Team Sync platform and Draft Assistant
• Fantasy baseball mock draft simulator
• Fantasy baseball draft cheat sheets
• Fantasy baseball closer depth charts
• Fantasy baseball prospects

Konnor Griffin, SS, Pittsburgh Pirates

Highest Level/ETA: Double-A/2026
MLB Prospect Rank: No. 1 overall
2025 MiLB stats: 122 G, 484 AB, .333 AVG, 21 HR, 117 R, 84 RBI, 65 SB, .437 wOBA, 165 wRC+
ADP: 170
RoY Odds: +300 (FanDuel)

Konnor Griffin burst onto the professional scene in 2025, blazing through the minor leagues, making his way from High-A to Double-A by season's end. He's also flown up the prospect ranks, all the way to No. 1 overall.

The former ninth-overall draft pick displayed an all-around skill set, with strong contact and power, along with plenty of speed, amassing a .333 AVG with 21 HRs, 117 R, 94 RBI, and 65 SBs. There was no slowdown hiding in that final stat line when he arrived at Double-A either, as he hit .337 with a .961 OPS in 21 games.

The Pirates' top prospect has an FV hit tool that comes in at 60, one of the highest ratings in the minors right now (the two with a higher value are also in this article below), but what makes Griffin the top prospect in baseball, is that the FV raw/game power comes in at 70 (highest in the minors) and his FV speed checks in at 70 (highest).

Not that it matters for fantasy (although it could help get him to the majors and be fantasy-relevant sooner), but Griffin's FV fielding rating registers at 60 (also highest), giving him an overall FV score of 70 (highest).

Without having played any games at Triple-A yet, there isn't much publicly available Statcast data like exit velocity to stuff into this article; however, as spring training games have already gotten underway, there is some data we can look at from those contests.

The right-handed slugger has gone 3-for-14 (.214) through six spring games, and all three of those hits were home runs. If not for some wind, a 397-foot flyout to center likely could have given him four homers. Six of the balls he's put in play have had an exit velocity of 104.8 or higher, with one of his homers coming off the bat at 111.2 mph.

Konnor Griffin ... WOW 🤯

MLB's No. 1 prospect goes yard AGAIN! pic.twitter.com/F1VTJnWlWB

— MLB (@MLB) February 24, 2026

So, should you draft him at his current ADP of 170 overall? Well, it depends on your league. If you have an available NA slot to stash him away in, go for it. If not, though, then he could be taking up valuable roster space until he debuts. As mentioned, the former first-rounder has yet to play any games at Triple-A and only 21 at Double-A, and he won't even turn 20 until late April.

There has been some well-deserved hype about the youngster making the big league club out of camp, with The Athletic's Ken Rosenthal recently reporting that the kid is "trending toward being" the team's Opening Day shortstop. Even so, just days before, Pirates Manager Don Kelly commented on Griffin starting the season in the majors, saying, "It would be a tough ask. Keep in mind he's only had a handful of at-bats at Double-A."

Could he have an impactful 2026 season? Sure, he's currently got the best odds for winning NL Rookie of the Year, but fantasy managers without an NA slot may want to consider drafting someone who can help their team early in the season rather than someone who may not be up until June. Keep in mind that teams who wait until after the "Super Two" deadline to bring up prospects (usually in June) can delay salary arbitration with a player, so there is a financial incentive to wait.

Nevertheless, if he continues to show out in the spring, Griffin could force the Pirates' hand. Managers who have the luxury of fantasy drafts scheduled closer to Opening Day should continue to monitor his performance. If there is any inclination from the organization that implies he'll make the roster out of camp, it would make drafting him at his ADP a no-brainer.

Kevin McGonigle, INF, Detroit Tigers

Highest Level/ETA: Double-A/2026
MLB Prospect Rank: No. 2 overall
2025 MiLB stats: 88 G, 331 AB, .305 AVG, 19 HR, 68 R, 80 RBI, 10 SB, .447 wOBA, 182 wRC+
ADP: 282
RoY Odds: +950 (FanDuel)

While Griffin has the higher overall rating, Kevin McGonigle has the higher-rated FV hit tool, coming in at 65. All he's done is hit since coming into professional ball, and he may be the best hitter in the minor leagues right now.

Beginning in 2023, for his minor league career, the former 37th-overall draft pick has hit .308 with a minuscule 10.3 percent strikeout rate. Not only that, the left-handed slugger has shown a superb eye at the plate, registering an amazing 15.0 percent walk rate.

The 21-year-old was sent to the Arizona Fall League (AFL) this past fall, and he went on to win the AFL Most Valuable Player award as the cherry on top of a fantastic 2025 campaign. The Tigers' top prospect hit .362 in 19 regular-season AFL games and, of course, walked more than he struck out (12:19 K:BB).

He also boasts a solid power profile, belting 19 home runs in 2025 in just 88 games (331 AB) and added five more in the AFL. So what's not to like?

Well, the one knock on MLB's No. 2 overall prospect could be that he has yet to stay healthy for a full campaign, having been limited to 74 games in 2024 (hamate fracture) and 88 last season (ankle sprain). Hopefully, that is something he can put behind him in 2026.

Like Griffin, the Pennsylvania native was invited to big league camp and has an outside shot at cracking the team's Opening Day roster, but -- also like Griffin -- the youngster has yet to play any games at Triple-A and has logged just 46 games at Double-A.

Kevin McGonigle smacks a single to left center. He stole 2nd base a bit later, too. pic.twitter.com/WvJCrn7GOD

— Tigers ML Report (@tigersMLreport) February 24, 2026

He's 6-for-15 (.400) through seven spring training games, including two doubles and a triple. He's also been getting reps at various infield positions this spring, which should help create multiple paths to the majors, even if it's not right out of the gate.

The 21-year-old looks like a player who won't be overmatched at any level and should see plenty of time in the majors this season. I even locked him in as my AL Rookie of the Year candidate in my 2026 Bold Predictions article, currently sitting with the sixth-best odds for AL Rookie of the Year at some books.

Stash him if possible; otherwise, keep a close ear to the ground for any indications that he'll be with the big league club and pounce (like a tiger!) to grab him off the waiver wire.

J.J. Wetherholt, INF, St. Louis Cardinals

Highest Level/ETA: Triple-A/2026
MLB Prospect Rank: No. 5 overall
2025 MiLB stats: 109 G, 408 AB, .306 AVG, 17 HR, 82 R, 59 RBI, 23 SB, .421 wOBA, 154 wRC+
ADP: 235
RoY Odds: +500 (FanDuel)

As the elder statesman of this group at 23 years old, J.J. Wetherholt is probably the closest to the majors of any of these guys, with 47 games at Triple-A under his belt and a clear path to playing time as the Cardinals' everyday second baseman. He and McGonigle own the highest-rated FV hit tools in the minors at 65.

The former seventh-overall draft selection began 2025 at Double-A after a strong initial showing at Single-A in 2024. At Double-A, the left-handed slugger slashed .300/.425/.466 with seven home runs and 14 steals in 62 games, earning a promotion to Triple-A for the remainder of the season.

There, he continued to impress, hitting .314 with 10 home runs and nine steals in 47 games. Putting legitimacy behind that batting average is the fact that he did not see a spike in strikeout rate at the higher level, going from 14.5 percent at Double-A to just 14.9 percent at Triple-A. A well-above-average walk rate of 12.7 percent at Triple-A helped to maintain a superb OBP of .416.

The Cardinals' top prospect is 3-for-8 (.375) through five spring games, with the patient approach and contact ability on full display, drawing five walks so far to just one strikeout, along with one home run.

Assuming the West Virginia University product begins the year with the big league club, he should have a chance to be fantasy-relevant for the entire season as opposed to maybe two-thirds of the season, which could be the case for Griffin and McGonigle. He's currently being drafted around 200th overall, but with playing time and the third-best odds for NL Rookie of the Year, maybe his ADP should be a tad higher.

Colt Emerson, SS, Seattle Mariners

Highest Level/ETA: Triple-A/2026
MLB Prospect Rank: No. 9 overall
2025 MiLB stats: 130 G, 506 AB, .285 AVG, 16 HR, 82 R, 78 RBI, 14 SB, .383 wOBA, 129 wRC+
ADP: 563
RoY Odds: +2500 (FanDuel)

Colt Emerson, with an FV hit tool rated at 60, should be the next prospect from a loaded Mariners minor league system to reach the majors after Cole Young and Harry Ford (now with the Nationals) debuted in 2025. Like Wetherholt, Emerson got a taste of Triple-A last year, although it was just a six-game sample. He showed well, though, going 8-for-22 (.364) with a pair of home runs in those six contests.

The former first-round draft pick has also looked good at the lower levels of the minors, playing against competition typically more advanced than him. For his career, the left-handed slugger owns a .287/.398/.442 in 224 games, with a low 17.4 percent strikeout rate and strong 13.1 percent walk rate.

There's some good pop as well, belting 16 home runs last season, many of which came in the first half of the year when he was just 19 years old. The now-20-year-old is 4-for-15 (.267) through seven spring games, but will likely begin the year at Triple-A Tacoma.

Colt Emerson loses his helmet when legging out this RBI triple, which came together by some help from the sun ... Short, compact and middle-of-the-field contact.

Exit velo: 101.8 mph
Sprint speed: 27.1 ft/sec pic.twitter.com/dztlU8HBNT

— Daniel Kramer (@DKramer_) February 26, 2026

If he continues to show above-average contact and power there, expect him to be up in the big leagues by midseason. For now, MLB's ninth-ranked prospect overall is just a stash candidate for those managers with roster space.

Honorable Mentions

• Jesus Made, Milwaukee Brewers, 2027 ETA
• Max Clark, Detroit Tigers, 2027 ETA

LIKE ROTOBALLER?

CLICK HERE, ENTER ROTOBALLER.COM, THEN CHECK THE BOX

More Fantasy Baseball Advice