Marco Gonzales put the American League on notice this season. The lanky left-hander was acquired by Seattle mid-way through 2017, making stops with 5 clubs at 3 different levels across the Mariners and Cardinals organizations while working his way back from Tommy John surgery in 2016. But Gonzales took a big step forward in 2018, going 13–9 with a 4.00 ERA while ranking 2nd on the club in starts (29) and innings pitched (166.2).
His 166.2 innings were his most for a full season at any level of his professional career. Gonzales, who makes his home in Seattle during the offseason, was 1 of 7 left-handers this season to earn at least 13 wins while working 165.