Back after posting an AL-best 2.14 ERA last season, the right-hander’s first pitch was hit by Corey Dickerson to the wall in center. After a walk, Carlos Gonzalez grounded into a double play.
Hernandez pitched a perfect second. Half of the five-time All-Star’s 18 pitches were strikes.
Wilin Rosario hit two home runs for Colorado, the first a two-run shot off Mariners rotation candidate Roenis Elias.
Gonzalez added a bloop single off Elias for his first hit in his second game back from knee surgery.
Offseason acquisition Kyle Kendrick struck out three in two scoreless innings for Colorado.