Hernandez felt fine while throwing a bullpen session on Monday, according to Mariners pitching coach Carl Willis, but the 27-year-old right-hander was "a little erratic," leaving the team to bump him back at least until the weekend. Hisashi Iwakuma will start on Wednesday, followed by James Paxton and Erasmo Ramirez. Hernandez is expected to participate in a bullpen session on Thursday.
Hernandez, a former Cy Young winner and four-time All-Star, hasn't pitched since Sept. 2. He is 12-9 with a 3.01 ERA in 194⅓ innings this season. His 9.3 strikeouts and 1.9 walks per nine innings are both career bests.