Chen struck out three and walked five while allowing five unearned runs on three hits over 4.1 innings Monday against Boston. While the left-hander took the loss, a trio of errors kept all of the runs he allowed Monday from counting against his ERA. Chen had uncharacteristically poor control Monday, while wet conditions at Fenway Park ultimately ended the game after seven innings. Chen will make his next start Saturday at Camden Yards in a rematch with Boston.