Donovan Walton hit a grand slam, Jakob Junis pitched six innings of one-run ball and the San Francisco Giants beat the Miami Marlins 5-1 on Sunday. Curt Casali had two hits and scored twice for the Giants, who split the four-game series with Miami and finished 5-5 on their three-city road trip. Junis (3-1) limited the Marlins to two hits, walked two and struck out a season-high eight.