Hernandez (13-6, 2.51 ERA) suffered his first defeat since June 12 in his last start. He gave up five runs over 7.1 innings in a 5-2 loss to the Angels. Nevertheless, King Felix is still the owner of the majors' lowest ERA, posting a 9-0 record with a 1.40 ERA over his last 14 starts.
The A's will send out rookie A.J. Griffin (4-0, 2.26), who has been outstanding so far with Oakland. He became the first pitcher in Oakland history to begin 4-0 as a starter, sending down the first 14 batters he faced in his last start en route to a 7-1 victory over Boston.
First pitch is set for 7:10 p.m. PT with coverage on Root Sports and 710 ESPN.
For more on the Mariners, make your way to Lookout Landing.