Montgomery exercised his $22.5 million player option for the 2025 season Thursday, Mark Feinsand of MLB.com reports.
Montgomery signed a deal with the Diamondbacks in March and didn't make his first start until April 19. He never seemed to get on track, however, posting a 6.23 ERA and 1.65 WHIP with just an 83:44 K:BB across 117 innings. Given his struggles, it's little surprise Montgomery exercised his option, and he'll look to rebuild his value in 2025 before heading into free agency.