Mon 9/1/14 3:33 PM

Masterson has been moved to the bullpen, MLB.com reports. Manager Mike Matheny has yet to name a starter for Thursday's opener against Milwaukee, but he has ruled Masterson out as an option, meaning it will be either Marco Gonzalez or Tyler Lyons. Masterson gave up five runs on six hits over 4.1 innings Saturday against the Cubs, marking the fourth time he's given up five runs in six turns with St. Louis.