Rising Stars and Breakout Prospects: MLB's Top Fantasy Baseball Phenoms to Watch in 2025

Discover the top MLB prospects making waves in 2025 fantasy baseball leagues, from Bubba Chandler's triple-digit heat to breakout hitters like Nick Kurtz. Expert analysis on rising stars and falling prospects to optimize your roster strategy.

Pitching Prospects Dominating the Radar

Bubba Chandler (RHP, Pittsburgh Pirates) continues to electrify Triple-A Indianapolis with a 46% strikeout rate and 1.69 ERA through three starts. His arsenal – featuring a 101.5 mph fastball, 90-mph slider, and evolving changeup – makes him the most-rostered pitching prospect in ESPN leagues. Despite control issues (20 BB in 50 Triple-A IP), his imminent MLB debut aligns with Pittsburgh's thinning rotation after Jared Jones' injury.

Andrew Painter (RHP, Philadelphia Phillies) resurfaces post-Tommy John surgery, retiring four batters in his Single-A return. The Phillies plan a July MLB debut for the triple-digit flamethrower, whose progression mirrors Chandler's ace potential.


Hitters on the Verge

  • Nick Kurtz (1B, Oakland Athletics): Crushing a 1.226 OPS with 7 HR in 14 games, the Thome-esque slugger could displace Tyler Soderstrom as Oakland's DH soon.
  • Sal Stewart (2B, Cincinnati Reds): A .290/.362/.581 slash line and 4 SB at Double-A highlights this contact-power hybrid. His walk-off grand slam signals MLB readiness.
  • Hyeseong Kim (2B, LA Dodgers): The KBO star rebounded from spring struggles to post a .581 SLG% at Triple-A, positioning himself as a midseason infield solution.

Prospect Watch: Rising vs Falling

Stock Up

  • Zebby Matthews (RHP, Twins): 1.80 ERA and 13 K/10 IP at Triple-A St. Paul makes him Pablo López's heir apparent.

Stock Down

  • Colson Montgomery (SS, White Sox): A 48% strikeout rate at Triple-A casts doubt on his MLB ETA.
  • Quinn Mathews (LHP, Cardinals): Shoulder woes and 15 BB in 55 PA derail his rotation bid.

Strategic Fantasy Insights

  • Stash Now: Chandler and Painter remain premium dynasty assets despite service-time delays.
  • Sell High: Thomas Harrington's 6-run MLB debut exposed command issues; temper expectations.
  • Buy Low: Walker Jenkins' ankle injury masks elite upside – target in keeper leagues.

Data through April 15, 2025. All stats via ESPN Prospect Analytics.

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