Colby Shelton is making noise at exactly the right time.
The White Sox No. 23 prospect on MLB Pipeline has turned the Arizona Fall League into his showcase, and even without a spot in the Fall Stars game, his production has made him hard to ignore. Through his first 15 games, Shelton has posted an .890 OPS with three homers, including a Grand Slam, along with 17 RBIs, seven runs, and matching totals of walks and strikeouts. His overall line sits at .277/.379/.511, and the run production has been the loudest part of the package.
That ability to drive in runs has followed Shelton throughout his climb. He was a sixth-round pick who didn’t arrive with huge prospect buzz, and he was a little older for his level after splitting his age-23 season between High-A and Double-A. But wherever he’s gone, he’s hit.
His college track record backed that up. In his first season at Alabama, Shelton broke the school’s freshman home run record with 25, which also tied the Southeastern Conference’s all-time freshman mark. After transferring to Florida, he followed with 20 homers and a .925 OPS in his second season.
The White Sox have watched him make adjustments since turning pro, and 2025 showed both the progress and the tradeoff. He put up a career-best .458 on-base percentage in 45 games, but the power dipped to seven home runs. The strikeout-to-walk picture improved sharply, too: after striking out 82 times and walking 35 times in 66 games in 2024, he cut that to 24 strikeouts and 21 walks in 2025.
That kind of step forward helped ease some of the questions around his bat. The White Sox selected him in the sixth round after the Nationals had taken him in the 20th and final round in 2024, when he was draft-eligible as a sophomore.
Baseball Savant’s 2024 scouting reports had his hit tool at 45, while his draft report bumped it to 50. The concerns centered more on speed and defense, with some doubt about whether his hit and power would be enough to carry him.
Chicago clearly hoped he could land in the middle ground: keep the on-base skills without giving away all the pop.
His first full pro season had some rough edges. Shelton finished 2025 with 27 games for Single-A Kannapolis and posted a .415 OPS in 155 plate appearances, with 14 hits, 11 walks and 25 strikeouts.
He answered back in 2026.
Shelton put together an .826 OPS between Winston-Salem and Birmingham, including a strong 31-game run at High-A where he hit .339/.464/.661 with a 17.9% walk rate and an 18.6% strikeout rate. His Double-A numbers were more modest - .213/.293/.432 with a 24.9% strikeout rate and 9.1% walk rate in 96 games - but he still finished with 21 doubles and 17 homers.
Regions Field can be tough on hitters, and that may have played a role in the dip. Even so, he still piled up 49 runs and 53 RBIs in Double-A, finishing the year with 82 RBIs and 73 runs overall.
His AFL work has only added to the momentum. One clip from October 13 showed him tying the game with a solo shot, another reminder that the power is real.
The next step is about refinement. Shelton’s recent surge should push him up prospect boards, but he’d help himself by driving the ball up the middle more often instead of leaning so heavily on pull power. His 2026 scouting reports flagged an uppercut, longer swing that can lead to too much swing-and-miss.
There’s more to his game than just the bat, though. He’s not a bad baserunner for someone with below-average speed, and he stole 14 bases while getting caught five times this year.
That success rate may not hold as he climbs, but for now it’s part of the value. Defensively, the fit is still being sorted out.
He played shortstop at Florida, but in pro ball he’s mostly handled second and third. His 2026 scouting report projected second base as his eventual home, and he should be fine there even if he never becomes a plus defender.
In the Fall League, he’s mostly played first base, which suggests the White Sox may be exploring that option too.
For now, Shelton has done what prospects are supposed to do: make himself impossible to overlook. The White Sox clearly believe in him, or they wouldn’t have sent him to the AFL after a full regular season. If he keeps hitting and sharpens the contact game again, he’ll have a real chance to put himself on the big league radar in 2027.
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