Hernandez was placed on the 10-day disabled list Wednesday after he pitched only two innings in his start at Detroit the previous night. He allowed four runs and threw 48 pitches. Hernandez is 2-2 with a 4.73 ERA in five starts this season.
“We’ll get them back and at some point we’ll be at full strength, but a lot of teams in the league have to deal with injuries, we’re not the only one, and it hurts, there’s no doubt,” Mariners manager Scott Servais said Friday.
Hernandez made at least 30 starts for the Mariners every season from 2006 through 2015. He made 25 starts last season, when he missed almost two months with a calf injury.
The team said outfielder Mitch Haniger will also miss 3-4 weeks with a right oblique strain. He’s batting .338 with four homers and 16 RBIs.
Both players underwent testing Friday in Seattle.
The Associated Press contributed to this report.