Mitch Haniger hit a grand slam in the sixth inning, two batters after Arizona ace Zac Gallen left because of tightness in his right hamstring, and the Seattle Mariners beat the Diamondbacks 6-1 on Friday night. Gallen (3-2) walked Josh Rojas to lead off the sixth, then was pulled in the middle of Julio Rodríguez’s subsequent at-bat. “Just a right hamstring spasm and I think we really dodged a bullet,” Diamondbacks manager Torey Lovullo said.