
Chris's fantasy baseball prospects to stash list for Week 23 of 2025. His top MLB prospects and rookie sleepers to make fantasy impacts this year when called up.
Welcome, friends, to the 2025 MLB season, and my weekly article about fantasy baseball prospects to stash heading into Week 23. Who are the top prospects you need to know for redraft leagues? We are back on our hot streak of predicting prospects getting the call, with at least one player in 13 of the last 14 articles getting called up within the week of the article being published. While Mick Abel stunk it up, he still got promoted nonetheless. Let's break down some new prospects to stash, such as Jac Caglianone, Sal Stewart, J.J. Wetherholt, and Robby Snelling.
Winning in a fantasy baseball redraft league requires a nice blend of high-floor players and upside shots. While prospects present more risk in a one-year setting, such as a redraft league, they pay big dividends if they succeed. The reward could be huge if these players receive adequate playing time and perform well.
Throughout the season, there will be plenty of prospects who will get promoted and make an impact on their respective MLB teams and fantasy teams. Getting ahead of the curve on these players can pay huge dividends in terms of FAAB bids. You can save money and have your league mates question how you are already in on that player so far in advance. Here are this week's fantasy baseball prospects to stash. These players can make a significant impact in redraft leagues for the remainder of the 2025 season and are expected to debut in the major leagues soon.
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Jac Caglianone, 1B/OF - Kansas City Royals
Caglianone dominated the minors this year and eventually made his MLB debut in June. While the results were not great in the Majors, Caglianone slashed .147/.205/.280 with five home runs in 41 games. After hitting the IL with a hamstring injury, Caglianone missed over two weeks before rehabbing with Triple-A Omaha. Since returning there, Caglianone has 23 hits in 13 games and is slashing .404/.460/.702 with four homers and five doubles.
Gains have been real on the contact side in pro ball this year, too, and the approach is cleaned up. The strikeout rate since returning from injury is down to 14.3 percent. The chase rate has dropped around six percentage points from 2024 and sits around 34 percent. The contact rate sits around 75 percent, and on swings in the zone jumps to over 86 percent and has been trending upward.
The power is the calling card, though. Caglianone's 90th percentile exit velocity being north of 110 mph, even against MLB pitching, is absurd and one of the highest marks in all of baseball. There is just so much to like in the profile with Caglianone, and he is getting closer to a return to Kansas City. At this point, it should be any day now, and Caglianone could return with vengeance. He massively underperformed in his first MLB stint and should be much better this time around.
Sal Stewart, CI - Cincinnati Reds
Stewart’s power outbreak has been impressive to watch, but it has not been surprising if you have seen him play. Blasting a 113 mph homer that traveled 460 feet on Saturday, Stewart also added a 107 mph homer. He homered again on Tuesday and is now up to 20 homers with 33 doubles, and he has as many Triple-A homers in 152 plate appearances as he did in 329 Double-A plate appearances.
From a contact standpoint, Stewart has posted a mark of 80 percent or better overall at every stop throughout his minor league career. Sure, it is a tick down from that in Triple-A, but Stewart is consistently improving and doing a ton of damage.
Stewart now looks like the power hitter some thought he could be. With multiple batted balls over 112 mph and an average exit velocity near 93 mph in Triple-A, Stewart is hitting the ball at ideal angles and is looking like one of the better prospects in baseball. The 90th percentile exit velocity has jumped and sits near 107 mph for the season.
He is ready for the majors and could be in Cincinnati soon. There is nothing to prove in Triple-A.
JJ Wetherholt, SS - St. Louis Cardinals
It seems like Wetherholt just keeps getting better and better. While he was good for most of the season, he has really taken things up a notch in Triple-A. In 153 trips to the plate with Memphis, Wetherholt has nine homers and a .336/.418/.634 slash, good for a 170 wRC+. He is not slowing down either, as he has 12 hits in his last five games at the time of writing.
Wetherholt is smoking balls with an average exit velocity of 91 mph and has raised his 90th-percentile exit velocity on the season to 104 mph. While Wetherholt does not post super high-end exit velocities, he consistently squares up baseballs and creates plenty of barrels. The Triple-A barrel rate stands at an impressive 13.5 percent, as Wetherholt has continued to launch balls at ideal angles.
When you talk about consistency, Wetherholt is who comes to mind. Wetherholt has hits in 72 percent of his games and has been on base in 83 of 95 games played this year. The feel for the barrel is fantastic, and his approach is so sound. He has certainly lived up to the hype of the 2024 seventh overall pick.
Currently, Wetherholt has an 81 percent overall contact with an in-zone contact rate that jumps to around 85 percent. He does not expand the zone and has walked as often as he has struck out. While the contact numbers have dipped a bit in Triple-A, the power has come out, even under the hood. The approach has remained good with a low chase rate and a respectable in-zone swing rate.
Expect Wetherholt to get a cup of coffee in September to get his feet wet and make a run at Rookie of the Year in 2026. Considering the calendar will turn to the final month of the season in a few days, and the Cardinals are out of contention, it is time to see what Wetherholt has in him.
Robby Snelling, LHP - Miami Marlins
The move to Triple-A has seen Snelling blossom, and he looks like one of the best arms in the minors. After six scoreless innings last time out, Snelling has a 1.09 ERA with a 33 percent strikeout rate to just a five percent walk rate in his last 57.2 innings. The dominance has been highly impressive, and Snelling could be on the cusp of an MLB debut.
When you look at Snelling, his strong frame probably does not scream premium athlete. But he is an exceptional athlete who was a four-star linebacker recruit, heading to LSU for both baseball and football. He spent little time focusing on baseball alone until being drafted. While 2023 was incredible, 2024 was a step in the wrong direction as Snelling posted a 6.01 ERA and a 5.50 FIP in 73 innings with the Padres’ Double-A affiliate before being traded to Miami for Tanner Scott. He did make improvements over the final two months of the season with Miami.
What Snelling has shown in 2025 looks back to the level of arm talent we saw in 2023, when he was named Baseball America’s Minor League Pitcher of the Year. His ERA is down to 2.73 and backed by a 2.85 FIP and 2.73 xFIP. The command has steadily improved, and Snelling has increased his strike rate to 68 percent, paired with a swinging strike rate of 14 percent.
The fastball used to sit in the low 90s with 16 inches of IVB from a 5’8” release height. Now, it is up to 95 mph on average with over 17 inches of IVB on average. Snelling gets 7-10 inches of arm-side movement with high spin rates for a four-seam and has shown the ability to miss bats.
His slider has some “slurvey” traits, having good depth and sweeping action. It's not quite a curveball, sitting in the low 80s, but it has a -5-inch IVB with 8-10 inches of horizontal. He is comfortable throwing it both in and out of the zone, getting whiffs and chasing. It runs away from left-handed hitters, but Snelling will also throw it to right-handers back foot on occasion.
The changeup has played quite well, generating 14 inches of fade on average while working around 88 mph. The added fastball velocity allows the changeup to play better now, given the separation between the pitches.
It is time to see Snelling in Miami to get some experience and prepare to be a part of the Marlins' rotation in 2026.
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