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Chris's fantasy baseball prospects to stash list for Week 15 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 15. Who are the top prospects you need to know for redraft leagues? Last week, we saw Colby Thomas and Jack Perkins make their MLB debuts. That makes six straight weeks of a prospect getting the call imminently after the article was published. As we approach the All-Star break, we are soon to see more. Let's break down some new prospects to stash like Samuel Basallo, Chase DeLauter, Joe Boyle, Brice Matthews, and more.
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 regarding 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 splash in redraft leagues for the remainder of the 2025 season and are expected to debut in the big leagues soon.
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Samuel Basallo, C - Baltimore Orioles
Basallo is a tough one to evaluate in terms of when he will get the call. Adley Rutschman is on the shelf. Chadwick Tromp is on the injured list. Maverick Handley is out with a concussion. Gary Sanchez got hit by a pitch on the hand on Tuesday night. All forces are coming together for Basallo to join the big league team, but I wonder if the Orioles will make the move. Part of me thinks they hold him down until August so he can retain rookie eligibility for 2026, and the Orioles have a shot at a PPI pick.
After dealing with some injuries and missing three weeks early in the season, Basallo is locked in. He is up to 16 home runs in Triple-A with 24 extra base hits in 55 games. Basallo is slashing a smooth .258/.381/.566 with impressive data.
The underlying data is absurd right now. Basallo has a 108.6 mph 90th percentile exit velocity with a 116 mph max. His barrel rate is at 20 percent thanks to a 55 percent hard-hit rate and the absurd exit velocities he puts up on balls in the air. The average exit velocity of 93.8 mph is one of the best marks in the minors.
From a contact standpoint, Basallo’s 70 percent overall contact rate is below average for his league, but age-adjusted is fine. Reminder, Basallo is still 20 years old. Basallo’s 82 percent contact rate on swings in the zone is a much better representation of the kind of contact he is capable of making when not chasing out of the zone.
The biggest worry with Basallo is his approach, though it has improved. The zone swing rate of 63 percent has steadily trended in the right direction, and the chase rate has gone down and is now at 30 percent.
While the Orioles need a massive jolt into their lineup, they remain committed to developing him as a catcher. That may continue to come in Triple-A. Could he get the call tomorrow? Sure. Could it be August 20? Sure, that is also realistic. Just know that if Basallo gets the call, he is worth rostering.
Chase DeLauter, OF - Cleveland Guardians
DeLauter was a feature last week in the article, but it is time for him to get the call. He has built up to playing nearly every day, and he won't stop hitting. There is nothing for DeLauter to prove in Triple-A anymore. Cleveland is just three games out of a wild-card spot, and Guardians right fielders have produced -2.5 WAR, the second-worst mark in baseball. Bring out DeLauter!
DeLauter continues to hit and now has a 15-game hit streak. You would need to go back to 29 games to May 19 to find the last time DeLauter did not get on base. The power and contact are both trending in the right direction as he has fully recovered from his injury. While many are quick to know the short follow-through and say it is a "bad swing," DeLauter has one of the better vertical bat angles in baseball.
If you have questions about whether DeLauter’s swing can play, look under the hood. The power is easily plus based on the average and 90th percentile exit velocities. He lifts the ball with ease and posts ideal launch angles consistently, and when you run a 90th percentile exit velocity of 107 mph, you will get homers. His barrel rate sits at a solid 10 percent. The chase rate is down to 14 percent to pair with an impressive 86 percent zone-contact rate.
After a successful career at James Madison University, the Guardians selected DeLauter with the 16th overall pick in the 2022 draft. While injuries have been a significant factor in his career, his performance was strong when DeLauter was on the field. Standing at 6-foot-3, DeLauter has one of the best combinations of athleticism and size in the minors.
Hunter Barco, LHP - Pittsburgh Pirates
At this point, it would not be surprising if Hunter Barco made a start in a Pirates uniform before Bubba Chandler did. Returning from a shoulder injury in May, Barco has dominated and really looked the part in his last two starts. On Sunday, Barco allowed just one hit and struck out seven across six innings. The only damage came from a Dairon Blanco homer.
In 57.1 innings this year, Barco has an impressive 2.04 ERA to pair with a 1.05 WHIP. He also has struck out 32 percent of batters faced while walking just shy of 11 percent. It would be easy to look at the walk rate and be concerned, but those numbers were inflated during the shoulder injury and while recovering from it. In his first five starts of the year, Barco walked just four total hitters, and over his last two starts, Barco has walked just one.
The fastball works around 95 mph and tops north of 97 mph, and the mid-80s slider was sharp. The splitter sits in the mid-to-upper 80s with devastating late movement and throws a more traditional changeup with depth and fading action. Barco throws two slider variations that sit in the low-to-mid 80s, with one having a shorter horizontal movement and one that plays more as a sweeper.
Joe Boyle, RHP - Tampa Bay Rays
Another week and more Triple-A time for Boyle, who deserves to be pitching in Tampa at this point, not Durham. Sure, the walks have come back as Boyle has three in each of his last two starts, but Boyle has still minimized the damage, allowing just one earned run each time out. His season-long ERA sits at just 1.85 now through 73 innings. Boyle has struck out 33 percent of batters while walking 10.6 percent; the walk rate is a huge improvement.
The fastball averages 98 mph and tops out at over 100 mph. Throwing from a 5-foot-8 release height, Boyle creates an average ride on the pitch but does a great job of manipulating the pitch and blowing it by hitters. In Triple-A, it has an impressive 17 percent swinging strike rate.
Boyle’s new look split-changeup runs up to 95 mph and sits 93 mph regularly. It has good depth and 15-20 inches of arm-side movement. The slider sits around 90 mph with a strong gyro-shape and misses bats at high clips.
I understand there is no direct opening for Boyle in the Rays' rotation. But a six-man rotation would make a lot of sense for many of the arms there currently.
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