McHugh will be moved to the bullpen, Jake Kaplan of The Athletic reports.
McHugh has struggled to a 6.37 ERA in eight starts so far this season, with a particularly poor 12.00 ERA over his last four. He had success as a reliever last season, recording a 1.99 ERA in 58 appearances. Corbin Martin is expected to be promoted for his big-league debut to start Sunday against Texas.