Montero (0-1) allowed four earned runs on three hits and a walk in two-thirds of an inning to take the loss Saturday against the Mariners.
Montero was tasked with protecting a three-run lead in the eighth inning, and he retired the first two batters he faced. However, he allowed the next four batters he faced to reach base -- two of which were on infield singles -- to suffer the ugly line and his first loss of the campaign. Montero has otherwise been solid, as he had turned in scoreless appearances in 10 of his 14 previous opportunities.