If you purely looked at the White Sox’ place in the MLB standings, you’d have no idea that Chicago leads the league with 15 MLB debuts already this season. At the time of this writing, Tanner McDougal has yet to pitch in a big league game, but once he does, he will add to the league-leading total. Despite the influx of youth on the south side of Chicago, the White Sox have shown their ability to compete against anyone in baseball and have their eyes on a playoff berth. With everyone on the current 40-man roster having played in the big leagues, there may not be any other debuts this season. The White Sox should still have a handful of big league debuts on the docket for 2027, and here are a few of the most notable.
SS Roch Cholowsky
Let’s start with the obvious. The White Sox drafted Roch Cholowsky knowing he could be quick to reach the big leagues, and their aggressive decision to assign him to High-A reflects that sentiment. Through his first 22 professional ABs, Cholowsky has posted an OPS of .801 with a home run and two doubles. Should he perform strongly down the stretch, the White Sox could opt to have him start 2027 in Double-A and may have a midseason debut in the cards. Cholowsky’s ceiling is as high as any prospect in the White Sox system and he’s likely to be ranked in the top spot when the updated midseason rankings are released. His 2027 debut is a very strong reason for White Sox fans to tune in.
ROCH CHOLOWSKY RIPS HIS FIRST PRO HOMER ‼️@whitesox | @WSDashBaseball | @UCLABaseball pic.twitter.com/5CCYNqXy4r
— MLB Pipeline (@MLBPipeline) August 7, 2026
INF Caleb Bonemer
The White Sox current top prospect who may be dethroned by Cholowsky, Caleb Bonemer won Carolina League MVP in his first season and has followed it up with a 29-homer season in his second year. If Bonemer can blend the power and contact potential he’s shown over the past two seasons, he can truly be one of the best hitters in the big leagues. Bonemer is likely to finish the season with Birmingham and could debut in 2027 just one step away from the major leagues in Charlotte. The White Sox will have to make a decision about his defensive position, but there’s no question about the talent in his bat.
INF William Bergolla Jr.
William Bergolla is one of the most unconventional prospects in the White Sox system. An elite infielder defender with elite bat to ball skills, Bergolla balances it out with virtually zero power or impact contact at the plate. Still, his defense and on-base ability are skills that should stick at the big league level. Bergolla could be the ideal utility infielder for the White Sox, and he posted strong offensive numbers in 11 games in Charlotte before an injury sidelined him. Bergolla likely won’t play again in 2026, but will resume 2027 in Charlotte where he’ll be on the cusp of his big league debut.
RHP Pierce George
The White Sox selected George in the 13th round in 2024 knowing they were getting a reliever with big stuff and control issues. George struggled with walks in 2025 and posted a 6.42 ERA in 47.2 innings in Kannapolis, but dominated in 10 games to start this season at the same level. After 15 solid games at High-A, the White Sox aggressively moved George up to Double-A. He’s struggled to a 7.64 ERA in 15 games for Birmingham, but the 23-year-old is flashing triple-digits on his fastball and throwing more strikes with his cutter and curveball. If George can rebound from his tough start in Double-A, he could be looking at Triple-A early in 2027 and may be a factor in the White Sox bullpen by the end of the season.
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