7 September Callups In 2025 That Surprise Contenders – Here’s Who Matters Now

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By: Jessica Morrison

Fans are stunned by 7 September callups. These late-season promotions in 2025 inject fresh talent into pennant chases and force contenders to reassess roster plans immediately. MLB Pipeline’s roundup highlights high-upside names – from Payton Tolle’s electric debut to JJ Wetherholt’s Triple-A tear – all of whom could supply lineup or bullpen shots down the stretch. Which of these youngsters will change October plans, and which are just auditioning for 2026?

Why these 7 September callups could reshape playoff races in 2025

  • Payton Tolle debuted Aug. 29, 2025; adds strikeout depth to the Red Sox bullpen.
  • JJ Wetherholt rose to Triple-A with a 1.058 OPS; provides middle-infield power and speed.
  • Andrew Painter returned from Tommy John and could stabilize Phillies rotation depth.
  • Sal Stewart hit a combined .890 OPS this year; gives Reds versatile corner power.
  • Harry Ford offers a .413 OBP in Triple-A and a tradeable bat/backup catcher role.

The 7 September callups that could move standings today in 2025

1 – Payton Tolle – The Red Sox Arm With Immediate Whiff Potential

Payton Tolle already made his MLB debut on Aug. 29, 2025, striking out multiple batters and showing a mid-90s heater plus plus extension. If Boston leans on his fastball-slider-splitter mix, he could shorten rest for the bullpen and hold late leads. If you follow Sox trade chatter, this is the arm that turns interest into urgency. Would you bet him to close tight September games?

2 – JJ Wetherholt – The Cardinals’ Infield Spark Who Forces Roster Decisions

JJ Wetherholt has slugged homers and stolen bases at Triple-A Memphis, posting a hot stretch that forced conversations about protecting him for Rule 5. His ability to play multiple infield spots and deliver a high-contact approach gives St. Louis a cheap upgrade option. Fans who love rookies will want to see him in situational at-bats – could he flip an inning or two this month?

3 – Andrew Painter – Phillies’ Repaired Arm With Rotation Upside

Andrew Painter, a top organizational arm, has worked back from Tommy John and logged quality innings at Triple-A this year, showing the changeup that profiles well in big-league matchups. For a Phillies staff needing innings, Painter’s return could shorten the bullpen and steady late-game planning. If he nails two solid starts, would the Phillies trust him in October?

4 – Sal Stewart – Reds’ Power Option Who Can Play Multiple Spots

Sal Stewart’s Triple-A surge (.314/.392/.610 since promotion) gives Cincinnati a slugger who can fill third, second, or DH roles during a tight Wild Card push. The Reds can slide him around to exploit matchups, and his power surge could produce immediate run impact off the bench. If you’re a Reds fan, does Stewart feel more like a flash or a new everyday piece?

5 – Harry Ford – Mariners’ On-Base Catcher Who Doubles As Trade Asset

Harry Ford’s .292/.413/.475 Triple-A line and 15 steals make him an unusual backstop prospect with on-base value and speed, blocked by Cal Raleigh but valuable in late-game situations. Seattle can use him as a tactical bat, late-inning runner or future trade chip if they choose roster flexibility. Would you start him against right-handed relievers this month?

6 – Carter Jensen – Royals’ Power Backstop Ready For Late Looks

Carter Jensen has slugged 11 homers since arriving at Triple-A Omaha and profiles as a left-handed power option who could work with Salvador Pérez down the stretch. Kansas City’s catching depth holes and Jensen’s Rule 5 eligibility argue for late-season exposure. If the Royals need a lefty punch in a key series, could Jensen be the surprise ignition?

7 – Bryce Eldridge – Giants’ Towering First-Base Prospect With Growing Power

Bryce Eldridge (6-foot-7) has found power in August and sits one homer away from his second straight 20-homer pace in the minors, offering San Francisco a potential left-handed run producer. Even a bench role for Eldridge gives the Giants a platoon weapon or depth bat for October. Are you tempted to pencil him into spot starts against righties?

The key figures behind these 7 callups in September 2025

Metric Value + Unit Change/Impact
Prospects highlighted 7 players Immediate bench/rotation depth
Average Triple-A OPS (sample) .392 Strong late-season production
Rule 5 eligibility count 3 names Raises November protection stakes

What will these 7 callups mean for fans and playoff runs in 2025?

Late promotions give contenders cheap, high-upside options and force roster choices before October. Teams that use these players shrewdly can convert a single hot streak into a postseason tilt. Which of the seven are short-term sparks, and who becomes a cornerstone for 2026?

Sources

  • https://www.mlb.com/news/one-potential-prospect-callup-for-each-team-2025

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