Leiter is scheduled to start Saturday's game against the Angels in Arlington.
Though he could end up being squeezed out of the rotation once both Jacob deGrom (elbow) and Max Scherzer (shoulder) return from the injured list, Leiter will retain a starting role for now. The rookie had been pitching well at Triple-A Round Rock since the All-Star break, but he's yet to find much success through his first five big-league outings. He'll carry an 11.78 ERA and 2.13 WHIP into Saturday's start.