Top-5 MLB Pitching Prospects To Stash For Fantasy Baseball Redraft Leagues - Week 15 (2025)

Andy's top pitching fantasy baseball prospects to stash for Week 15 (2025). His MLB prospects to pick up and stash on your bench and N/A spots in redraft leagues.

Welcome back to our top starting pitcher fantasy baseball prospects to stash for Week 15 of the 2025 MLB season. This week, we saw Joe Boyle get the call, but will he see time as a starting pitcher?

In this piece, we will check in on some of our recurring names and see if their recent production has put them in a better position to reach the majors. We also have a new No. 1 stash target!

Below are the top pitching prospects to stash leading up to Week 15 of the 2025 MLB season.

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Andrew Painter, Philadelphia Phillies

Currently At Triple-A
5% rostered

After months of sitting behind Chase Burns, Jacob Misiorowski, and Bubba Chandler, the top prospect in Philadelphia finally claims the top spot on this list. Painter has been slowly working his way back from Tommy John and is officially on the must-watch list. Earlier this season, Phillies manager Rob Thomson noted that Painter was not expected to get the call to the majors until July.

More importantly, Painter has begun to turn the corner at Triple-A at the right time.

In his most recent outing on July 3, Painter struck out an impressive seven batters across five innings of four-run ball. Since allowing six runs on June 10, the former 13th overall pick has posted a 3.72 ERA, 1.34 WHIP, and a 23:8 K:BB over his last 19 1/3 innings of work.

This is an excellent sign as Painter posted a hefty 5.19 ERA with a 1.50 WHIP during his first 26 innings with Triple-A Lehigh Valley earlier this season. Painter opened the campaign with Low-A and held a 12:1 K:BB through 11 1/3 innings of five-run ball.

While Painter may not get the call until after the All-Star break, he has an excellent opportunity to be in the mix in the near future as the Phillies recently sent down right-hander Mick Abel. Abel was promoted from Triple-A to replace Aaron Nola, who was placed on the 60-day IL. However, given Abel's struggles, the Phillies opted to turn back to veteran Taijuan Walker in the short term.

However, Walker has also not found much success this season. Painter could make his MLB debut as early as next week, especially if Walker continues to stumble as a starting pitcher.

Painter is a must-stash option in all 12-team leagues going forward.

The #Phillies will have an opening in their rotation after the All-Star break, and might use top-ranked prospect Andrew Painter to fill it 👀

MLB's No. 10 overall prospect has 52 K's over 45 1/3 frames at Triple-A this season: https://t.co/j23OIYIw98 pic.twitter.com/MBMgDBedHj

— MLB Pipeline (@MLBPipeline) July 4, 2025

Bubba Chandler, Pittsburgh Pirates

Currently At Triple-A
30% rostered

Coming in as a close second is familiar friend Bubba Chandler. While Chandler carries just as much upside as Painter, if I had to pick one to stash at the moment, I would lean toward Painter.

Chandler has had a disastrous June, which has caused his prospect stock to plummet (in the short term). During June, the No. 2-ranked prospect on MLB.com posted an 8.53 ERA with a 2.29 WHIP. During these 12 2/3 innings (five starts), the right-hander served up 12 walks and struck out just 11 batters.

However, Chandler has already begun to get back on track. On July 4, the top prospect in the Steel City tossed six shutout frames against Triple-A Louisville. In this start, he allowed just five hits and served up two walks. He struck out six. While Chandler will need to enjoy several of these outings consecutively to re-enter the must-stash conversation, this was a significant step in the right direction.

Before June, Chandler appeared to be the next budding pitcher in baseball, logging 48 2/3 innings to the tune of a 2.03 ERA with a 1.07 WHIP. During this stretch, Chandler struck out 69 batters and served up just 21 walks. During his first taste of Triple-A last summer, Chandler posted a remarkable 1.83 ERA with a 1.05 WHIP through 39 1/3 innings.

If Chandler can continue to lower his walk rate, he should be in the mix to join the Pirates later in July.

Make it SIX scoreless frames from Bubba Chandler!

MLB's No. 5 prospect (@Pirates) generates 14 whiffs on 39 swings and strikes out six for the Triple-A @indyindians. pic.twitter.com/uGamaE2wLm

— MLB Pipeline (@MLBPipeline) July 5, 2025

Joe Boyle, Tampa Bay Rays

Currently At Triple-A
6% rostered

Moving up to the No. 3 spot is Joe Boyle. After weeks of typically sitting in the fourth spot on this list, his incredible June has pushed him up and has actually just earned him the call to the majors, which means this will be the last time he will appear on this list.

On Sunday morning, the Rays opted to promote Boyle to the big leagues, but not as a starting pitcher, which is why he doesn't sit in the No. 1 spot on this list.

In June, Boyle was one of the best pitchers in the minor leagues, posting a stellar 1.80 ERA with a 0.97 WHIP through 30 innings with Triple-A Durham. During this stretch, Boyle struck out 49 batters and only allowed 11 free passes.

During his first 43 innings of the Triple-A regular season, Boyle was just as dominant, posting a 1.67 ERA, 0.98 WHIP, and a 47:20 K:BB.

While Boyle is no longer viewed as a traditional prospect, his longest stint in the majors was just 47 2/3 innings long, and it did not go very well. Last season, Boyle stumbled during his first extended look in the MLB with the Athletics. The right-hander posted a high 6.42 ERA with a 1.72 WHIP. He showcased excellent strikeout upside, tallying 56, but had very weak command, allowing walks at a 17.7% rate.

Boyle was eventually traded to Tampa Bay in the offseason, in a move that sent Jeffrey Springs to the Athletics.

While Tampa Bay has kept Boyle in the minor leagues for the majority of the season, he was given one spot start and was quite impressive, tossing five no-hit innings against the Braves.

Currently, there is no clear opening for Boyle, which makes his rest-of-season outlook difficult to project. When he returned to the majors on Sunday, he was deployed in a long relief role behind right-hander Drew Rasmussen. While he could log four to five innings in each appearance, he may not be given the most opportunities to pick up a victory and tally many strikeouts.

Given that he is back in the majors, he is worth adding in all 12-team leagues and above. However, shallow league managers should leave him on the waiver wire until he officially rejoins the rotation.

Our very own Joe Boyle won the International League Pitcher of the Month with the Durham Bulls in June!! Congratulations!!@RaysPlayerDev // #GrowlersPipeline pic.twitter.com/MXQdWxuIMa

— Kalamazoo Growlers (@KzooGrowlers) July 3, 2025

Quinn Mathews, St. Louis Cardinals

Currently At Triple-A
1% rostered

After allowing five runs on June 24, Quinn Mathews enjoyed a much-needed bounce-back on June 29. In this outing against the Durham Bulls, the left-hander tossed 4 2/3 shutout innings with four hits and three walks. He struck out four.

Mathews was in the mix to reach the majors early in the first half of the season but suffered a shoulder injury, which kept him on the shelf for nearly a month of play. Before hitting the IL, this shoulder injury clearly hindered his production as he allowed seven runs over his first 10 2/3 innings of work.

During his first 18 2/3 innings after returning to Triple-A, Mathews posted a strong 2.89 ERA with a 1.34 WHIP. He struck out 25 batters over this stint and allowed 13 free passes.

While his five-inning explosion on June 24 has inflated his Triple-A ratios, Mathews has been performing very well and could join St. Louis before the All-Star break.

Last season, the No. 40-ranked prospect in the sport was one of the most dominant pitchers in the minor leagues. He opened the season with Low-A and was able to finish the campaign with Triple-A. Through 126 2/3 combined innings across Low-A, High-A, and Double-A, Mathews posted a remarkable 2.27 ERA with a near-perfect 0.85 WHIP.

He allowed just 35 total free passes over this stretch while striking out 180 batters.

Mathews is worth stashing in all 12+ team leagues heading into Week 15.

Congratulations to José Fermín & Quinn Mathews on being named International League Player & Pitcher of the Week!

Fermín led the league in AVG, OPS, XBH while Mathews notched his first scoreless Triple-A start of the season. pic.twitter.com/w3xfsydAZV

— Cardinals Player Development (@CardsPlayerDev) June 23, 2025

Nolan McLean, New York Mets

Currently At Triple-A
1% rostered

While Jonah Tong has stolen much of the pitching spotlight in the Mets' system this season, Nolan McLean is putting together a solid campaign and is inching closer towards his MLB debut.

In his most recent outing on July 3, the No. 6-ranked prospect in the system struck out 10 batters across five innings of two-run ball en route to picking up the victory over Triple-A Worcester. In this start, he served up just one free pass and allowed seven hits.

Since moving up to Triple-A in early May, McLean has posted a strong 2.80 ERA with a 1.17 WHIP across 54 2/3 innings. During this stretch, the right-hander has struck out 55 hitters and allowed just 23 walks.

The right-hander began the season with Double-A but needed only 26 1/3 innings to prove he was ready to join the top ranks of the minor leagues. In this stint, he held a stellar 1.37 ERA.

Last season, McLean spent most of his time with Double-A, but struggled, holding a high 4.19 ERA with a 1.32 WHIP. Seeing McLean take such a significant step forward against tougher competition this season is a great sign.

In addition, McLean has a path to join the Mets in the near future. They recently lost right-hander Griffin Canning to a season-ending Achilles injury. Kodai Senga (hamstring), Sean Manaea (elbow), Tylor Megill (elbow), and Paul Blackburn (shoulder) are also all on the IL, but the first two names are nearing their return.

Even so, the Mets will likely closely monitor their workload, especially Manaea's, as he has yet to pitch this season. With the Mets in the heat of the playoff race, McLean should be in a great position to get the call later in the second half to ease the workload of their current starters.

Nolan McLean (NYM) was outstanding today as he racked up 10 K across 5.0 IP

The stuff is elite and the command continues to improve. He is one of the best pitching prospects in baseball! https://t.co/mTLw3xRn2Y pic.twitter.com/EPpqzjUvkK

— Thomas Nestico (@TJStats) July 3, 2025

Other Prospects To Consider Stashing

• Logan Henderson, MIL
• Cam Schlittler, NYY
• Carson Whisenhunt, SF
• Caden Dana, LAA
• Ian Seymour, TB

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