3 under-the-radar Mariners picks from the late rounds of 2025 MLB Draft

The Seattle Mariners made 21 total selections in this year's MLB Draft. Kade Anderson was the organization's first pick, and for good reason, followed by three more relatively high-profile players.

However, buried in the 17 names taken on the second day are some dark horse candidates to be real difference makers in the not-so-distant future.

The Mariners' 3 best picks from Day 2 of the MLB Draft

Luke Heyman, C: 14th round, No. 422 pick

Despite being draft-eligible last year, a rough second half tanked Heyman's stock enough for him to go undrafted and return to the University of Florida for the 2025 season. It proved to be the correct call, as he bounced back big with a .975 OPS over 204 plate appearances. Scouts describe him as a solid catcher on both sides of the plate with considerable power upside.

He's the latest in a stretch of power bats to be drafted from the University of Florida, but doesn't quite have the same prospect profile as his former teammates Wyatt Langford and Jac Caglianone. However, the Mariners have had a good track record so far with slugging backstops drafted out of Florida colleges, so don't count Heyman out just yet.

Grant Jay, C: 12th round, No. 362 pick

Grant Jay spent his last three seasons with Dallas Baptist University, where he posted an astounding 1.116 OPS over his 776 total plate appearances. Throughout his college career, he split time between catching and left field and his well-rounded skillset initially had scouts predicting that he would be taken at some point in the first five rounds. However, there is some cause for concern given his poor performance in the Cape Cod League last summer, where he managed just a .594 OPS over 97 plate appearances while using wood bats.

He was ranked as the 170th overall prospect in this year's draft by MLB Pipeline, but likely fell in the draft due to concerns with his contact abilities against higher levels of pitching as well as his positional uncertainty. He was seen as one of the best backstops in college baseball, but mostly due to his bat as he seemed to lack the more nuanced defensive aspects of the role such as blocking and receiving.

Still, it's clear that he has some natural pop and the Mariners aren't necessarily in need of a catcher any time soon, so they'll have plenty of time to decide what road they want to set him on as a professional.

Korbyn Dickerson, OF: 5th round, No. 152 pick

Dickerson was one of the earlier selections on the second day of the draft, getting his name called in the fifth round with the 152nd overall pick. Originally slated to be drafted out of high school, he wasn't taken by the Minnesota Twins until the 20th round in 2022 and followed through on his original commitment to Louisville. The outfielder didn't really play a full season of college baseball until transferring to Indiana University, with whom he posted a 1.014 OPS with 14 doubles and 19 home runs over 271 plate appearances this past season.

Although he has shown the ability to drive balls out of the park, scouts have noted that his aggressive swing decisions and eagerness to pull pitches make it more difficult to him to perform against more advanced pitching, specifically against higher velocity. Still, his speed/power combination are an alluring combination and MLB Pipeline had him ranked as highly as 83rd overall. Despite not being taken until the fifth round, Seattle seems to have faith in his upside and isn't too worried about his relative lack of experience.