The veteran guard aggravated his sore groin and is likely out against the. Rookie will make his first NBA start for Hamilton in Friday's game.
Hamilton suffered the groin injury early in the season and was forced to miss 10 games. He had played in the Bulls' last five games, though, twice scoring 20 points or more.
Jimmy Butler has appeared in 10 games for Chicago this season, averaging about four minutes of playing time per appearance. He has one double-digit scoring night to his credit: a 12-point effort against Atlanta on Jan. 7.