Felix Hernandez pitched eight innings of four-hit ball, Austin Jackson delivered a go-ahead RBI triple in the sixth, and the Seattle Mariners beat the San Francisco Giants 2-0 Wednesday night. Hernandez (10-4) allowed four hits, struck out five and walked two to rebound from the worst outing of his career. The Mariners' ace allowed a runner to reach scoring position twice, but both times he quickly retired the side by inducing a groundout.