2025 MLB Draft: Breaking Down Korbyn Dickerson, Mariners’ Day 2 Selections

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Indiana Hoosiers outfielder Korbyn Dickerson awaits a pitch during a Big Ten regular season game. The Seattle Mariners drafted Dickerson in the fifth round. Credit: Korbyn Dickerson/Instagram [/caption]

The second day of the MLB Draft is not exactly the most enthralling for all but the most hardcore of draftniks. There’s a reason no one televises it - and the third day is obviously even “worse” - as it features players who are several years away from being ready for the majors being selected, and the majority of them won’t see anytime in the show at all.

That being said, there are always players who go between the fourth and 20th round who end up having successful careers, and the Mariners drafted a handful of players who have a chance to help the organization in the coming years.

Let’s take a look at who Seattle added on Day 2 of the MLB Draft:

Round 4: Mason Peters, LHP, Dallas Baptist University

The Mariners didn’t select a single prep player Monday, which isn’t a surprise. The draft becomes college-heavy - college heavy is an understatement - after the first three rounds as teams look to secure organizational depth, and prep players do have some leverage so the signing bonuses become more of a concern.

The first of these players is Peters, and it’s an intriguing profile. The numbers aren’t overly impressive, as he forged a 4.25 ERA over 42 1/3 innings over 20 appearances, with 16 of those coming in relief. He was able to strike out 58 hitters over that time frame, and the swing-and-miss stuff is readily apparent. He’ll touch 97 mph with his fastball while sitting 93-95, and he generates enormous spin on his breaking-ball, a slurve that has enough depth to get left and right-handed hitters out. He’s assuredly a reliever and he’s going to have to show considerably improved command to pitch at the highest level, but there’s some reason to believe he could move quickly through the system if it takes place.

Round 5: Korbyn Dickerson, OF, Indiana

I loved this pick. It’s easily my favorite of Seattle’s picks on Day 2, and I have to be honest, I didn’t even realize he was still available.

Dickerson transferred to Indiana from Louisville and he was one of the best performers in the Big Ten with 19 homers and an OPS of 1.014 over 271 plate appearances with the Hoosiers. The 21-year old - 22 in October - is an excellent athlete who puts up plus run times, and he should be able to handle center field without issue. He would just be fine in a corner as well with a solid throwing arm, so he offers some versatility.

More importantly, Dickerson offers some serious offensive upside. There’s considerable bat speed in his right-handed swing, and there’s a chance for above-average power and a solid hit tool to go with it. He didn’t perform as well against the better arms, but the talent is obvious. I won’t be shocked at all if Dickerson develops into a starting outfielder, with a solid bench bat as a realistic floor.

Round 6: Lucas Kelly, RHP, Arizona State

Kelly is strictly a reliever, but could be a good one with a little refinement. He’s been up to 99 mph with his fastball, and he complements that heater with a slider that doesn’t offer much consistency, but will flash above-average on his better days. The command is very much a work-in-progress, and his arm path makes it unlikely he’ll be effective against left-handed hitters. Still, if you get a 70-grade fastball, 55-slider in the sixth round, you’ve done pretty well. It’s possible the Mariners did just that.

Round 7: Colton Shaw, RHP, Yale

Well, we know Colton Shaw is smart. I don’t have a heck of a lot on him nor these next four picks, but I was able to contact some area guys to get a little bit of info, or at least enough to feel confident enough to finish this article, anyway. He’s a 6-2 right-hander who typically works in the low-to-mid 90s with a change that flashes plus and a fringy slider. This is the type of profile the Mariners have done wonders with, but it’s just as likely he’s organizational depth as it is that he’s starting games for Seattle.

Round 8: Danny Macchiarola, RHP, Holy Cross

Macchiarola was the Friday starter - the “ace” for those unfamiliar with that term - for Holy Cross in 2025, and he forged a solid 3.27 ERA with 92 strikeouts over 93 1/3 innings against 27 walks. His best pitch is a sweeping slider that gets plus grades at times, and he also features a solid change. His fastball leaves a lot to be desired since he’s mostly 89-91 mph, and he’ll need to add velocity and some movement to the pitch to face MLB hitters.

Round 9: Jackson Steensma, RHP, Appalachian State

Steensma has the size you’re looking for from an MLB hurler at 6-4, 240-pounds, and he also has a fastball that generates a large amount of spin and quality extension. He also shows a solid slider, and does a decent job of filling the strike zone. Unfortunately, Steensma missed all of 2025 after undergoing Tommy John surgery, so it remains to be seen whether he can show this same level of stuff when he gets back on the mound. In the ninth round, it is well worth the risk.

Round 10: Isaac Lyon, RHP, Grand Canyon

Yep, another pitcher. Lyon registered a 4.19 ERA and 88 strikeouts over 86 innings in the WAC. He’s a sidearm hurler who can get up 94 mph with his fastball and offers a four-pitch mix. The arm slot could create problems for right-handed hitters, and it’s likely his future is in the bullpen rather than in a rotation.

There’s not a ton of “sexy” here outside of maybe the Dickerson pick, but there’s some solid depth that has a chance to help the Mariners either via promotion or trade in the coming years. You just never know.