Michael Harris hit a grand slam in his first at-bat after missing nearly two months because of a hamstring injury, helping the Atlanta Braves rout the San Francisco Giants 13-2 on Wednesday night. Activated from the injured list before the game, Harris crushed an 0-1 curveball from Robbie Ray (2-2) into McCovey Cove for his first career grand slam and Atlanta’s fourth of the season. Grant Holmes (1-0) had six strikeouts in seven innings in his first career victory. The 28-year-old rookie allowed eight hits and two runs. Former Giants pitcher Luke Jackson and Jimmy Herget retired three batters each to finish the game. Matt Olson, Austin Riley and Sean Murphy also homered for Atlanta in the Braves’ third consecutive victory over the Giants.