Kopech struck out four in two scoreless innings Tuesday against the Twins, issuing three hits and no walks.
Kopech made his MLB debut Tuesday, throwing 52 pitches (35 strikes) in the start while allowing no extra-base hits and hitting a batter. Unfortunately, a lengthy rain delay led to an abbreviated outing. The 22-year-old went 7-7 with a 3.70 ERA, 1.27 WHIP and 170 strikeouts in 24 starts (126.1 innings) for Triple-A Charlotte prior to his promotion, and he figures to remain with the White Sox pitching staff for the remainder of the year.