3 Impact Fantasy Baseball Prospects To Stash - Bubba Chandler, Roman Anthony, Coby Mayo

Three top fantasy baseball prospects - Bubba Chandler, Roman Anthony, Coby Mayo - that can make big impacts. These MLB prospects are waiver wire pickups or stashes.

If your fantasy baseball team could use a midseason burst of energy, one of the best places to watch for some help is the top prospects teams call up to join the team as the season goes on. Catching the right prospect around the time of their promotion can be a huge boost to your team and help patch up any holes on your rosters due to injury or underperformance.

In this article, we will look at the latest from three key prospects and when they will be ready to make a fantasy impact on your team. We'll examine Bubba Chandler of the Pittsburgh Pirates, Roman Anthony of the Boston Red Sox, and Coby Mayo of the Baltimore Orioles. All three prospects started the season in the minors but could be excellent pickups later this year.

So, let's dive in and see if these three prospects should be stashed or grabbed off the waiver wire before it's too late.

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Bubba Chandler, SP, Pittsburgh Pirates

Current Level: Indianapolis Indians (Triple-A)
Availability: 32% rostered
2025 AAA stats: 10 G, 42 2/3 IP, 2.27 ERA, 3.09 FIP, 20 BB, 61 K

Chandler has become the top pitching prospect in baseball, and MLB Pipeline ranked him as the No. 2 prospect in all of baseball. The 22-year-old righty has been dominant this season at Triple-A, showing off his impressive strikeout stuff and his extremely high ceiling.

He has only two victories all season, but he has only given up more than two runs in one of his 10 outings. He has had some control issues with multiple walks in four straight outings, averaging 3.3 walks per outing over that short span.

In his last start, he had four walks, but he also had five strikeouts and didn't give up a hit until the seventh inning against the Toledo Mud Hens.

Bubba Chandler carried a no-hitter into the 7th inning! -

Final line:

6.1IP, 1H, 2R, 2ER, 4BB, 5SO’s

Control a bit of an issue - but he worked his way around trouble.

A 2.26 ERA this year down in AAA! pic.twitter.com/P9r21iKNOU

— Christian ✞ (@CWolfPGH) May 25, 2025

Despite his success in Triple-A, the Pirates haven't given Chandler a shot yet in the majors. He has been working to incorporate his slider and changeup into his pitch mix more heavily, alongside his exceptional fastball that regularly hits triple-digits. He also continues to work on improving his command.

The team recently called up Mike Burrows to join the rotation and Braxton Ashcraft to fortify the bullpen, but Chandler has continued to work in Indianapolis. He doesn't have much more to prove at Triple-A, though, and his promotion seems like it could come at any point.

Whenever he does get the call, Chandler should be one of the hottest fantasy pickups of the season. He has a ceiling to make a huge impact down the stretch. He may not get much run support when he arrives--just ask Paul Skenes and his fantasy managers. However, his strikeout upside and dominant performance at Triple-A still make him the hottest pitching prospect to watch.

As we near the end of May, Chandler is only rostered in about one-third of fantasy leagues. If you can stash him now and hold him on your roster, he'll be worth owning in all formats once he joins the Pirates in the majors.

If there's any way to hold him on the bench in whatever format you are playing, he'll be worth it when he arrives.

Roman Anthony, OF, Boston Red Sox

Current Level: Worcester Red Sox (Triple-A)
Availability: 29% rostered
2025 AAA stats: 49 G, .318/.450/.528, 8 HRs, 23 RBI, 40 R, 3 SBs

Anthony is the only prospect ranked higher than Chandler in the top 100 prospects by MLB Pipeline. Anthony has continued to mash at Triple-A for most of the season, but he also has yet to make his MLB debut.

Last year, Anthony split time between Double-A and Triple-A, hitting a combined .291 with 18 homers, 21 stolen bases, a .401 wOBA, and a 45.1% hard-hit rate. This season, his hard-hit rate has jumped to 60.9%, and his average exit velocity is 95.6 miles per hour. To put that in context, in the majors, Aaron Judge's average exit velocity is 95.4 miles per hour, and only Shohei Ohtani and Oneil Cruz have a hard-hit rate over 60%.

Anthony has hit .358 (24-for-67) with four doubles, a triple, three homers, 18 runs scored, and 21 RBI in his last 19 games. Like Chandler, he has proven just about everything he can at Triple-A at this point and is ready for his promotion that could come any day.

Alex Cora says Roman Anthony will be up and will contribute at some point, and that the organization has been having conversations:

“He’s not knocking on the door, he’s knocking it down.”

(via @WEEIAfternoons) pic.twitter.com/fQYG4DceG2

— Gordo (@BOSSportsGordo) May 29, 2025

The Red Sox outfield is a little crowded, so finding space for Anthony will be a challenge. Wilyer Abreu has cooled off a little bit after a fast start and could be the most likely option to lose playing time, but Ceddanne Rafaela could also serve as a fourth outfielder and defensive specialist or move to the infield at 2B temporarily if Kristian Campbell slides to first base.

Jarren Duran is in the other outfield spot, and Rafael Devers is locked in at designated hitter after plenty of drama, leaving no obvious full-time role for Anthony.

When the Red Sox make the call and move Anthony to the majors, he'll need a full-time role and bring an immense upside. He will have a good chance to be the best addition for fantasy baseball this entire season, so be aggressive in stashing him or using a large portion of your budget to land him if needed.

At this point, the biggest risk with Anthony is that the Red Sox will continue to play the waiting game longer and keep him at Triple-A instead of giving him a chance to deliver in the majors. Once he arrives, though, he has a good chance to take the league by storm and be an instant fantasy star.

Coby Mayo, 3B, Baltimore Orioles

Level: Norfolk Tides (Triple-A)
Availability: 5% rostered
2025 AAA stats: 53 G, .224/.319/.460, 8 HRs, 27 RBI, 24 R, 8 SBs
2025 MLB stats: 4 G, .083/.154/.083, 0 HRs, 0 RBI, 0 R, 46.2% K%

Unlike Chandler and Anthony, Mayo has made his debut in the majors. Unfortunately for him and his fantasy managers, his experience at the highest level didn't go according to plan for the 23-year-old right-handed power hitter.

In his 17 games in the majors last year, he hit .098 (4-for-41) with 22 strikeouts, and in four games in the majors this year, he hit .083 (1-for-12) with six strikeouts.

In Triple-A, he still shows impressive power potential but is hitting only .224 with a 27.1% strikeout rate and .344 wOBA.

MLB's No. 17 prospect Coby Mayo (@Orioles) goes DEEEEEP to left-center field for his 8th Triple-A @NorfolkTides homer of the season! pic.twitter.com/pbuhpHaz10

— MLB Pipeline (@MLBPipeline) May 25, 2025

Mayo has the raw power to succeed in the majors and be a huge fantasy pickup if he can adjust his plate approach to translate his Triple-A success to the next level. Mayo's low batting average and high strikeout rate make him high-risk at this point, and the fact that the Orioles don't seem ready to give him the everyday role any time soon makes him very hard to stash.

The Orioles' starting 3B Jordan Westburg landed on IL with a hamstring issue and had a setback that kept him out longer, but the O's still went with Emmanuel Rivera and Ramon Urias instead of giving Mayo a longer look. With Westburg expected to be back in June, Mayo may not get another look until the end of the season.

Of the three prospects in this post, he seems to be the farthest away from making a fantasy impact. His raw skill set is intriguing, and his high ceiling is apparent, but he has not delivered in the majors yet and doesn't seem on the verge of getting another shot.

His situation could change quickly with a trade or shift in the Orioles' plans after their slow start to the year, but until it does, he's much more of a "watch and wait" option than a "buy now."

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