Aroldis Chapman is scheduled to start and pitch one inning Tuesday night for Triple-A Louisville against Norfolk, then pitch one inning of relief for the Bats during Wednesday's day game.
Two leaders of Major League Baseball's investigations department are among five employees to leave following last year's drug inquiry that led to suspensions of more than a dozen players.
Iwakuma strained a tendon in the middle finger of his right hand when he caught the finger trying to retrieve a ball from some netting while working out Jan. 20 in Southern California.