Korean pitcher Ko Usok ejected for illegal glove substance in U.S. minor league game

South Korean right‑hander Ko Usok, a recent Minnesota Twins prospect, was removed from the mound before delivering a pitch in a Triple‑A game after umpires discovered a foreign substance inside his glove. The discovery led officials to confiscate the glove and announce his ejection, a rarity in professional baseball.

The incident occurred during his Triple‑A debut for the St. Paul Saints, a Twins affiliate, and comes after Ko’s brief stint in the major leagues followed by a demotion. The violation could trigger a ten‑game suspension, jeopardizing his chances of returning to the majors and complicating any potential move back to the Korean Baseball Organization.