Montas (5-4) was tagged with the loss Monday against the Mariners after allowing four runs on six hits and three walks while fanning 11 across six innings.
Though he took his second straight loss, the 11 strikeouts represented a season high. The long ball has been an issue for the right-hander, who has now given up a career-high 11 homers in just 53 innings (1.9 HR/9). Montas will carry a 4.92 ERA into his next start, scheduled for Saturday at home against the Angels.