Semien's grand slam to center
Giants @ AthleticsJuly 31, 2017 | 00:00:23
Marcus Semien launches a grand slam over the center-field wall to give the Athletics a 6-3 lead in the 6th inning #PapaSlam
Marcus Semien launches a grand slam over the center-field wall to give the Athletics a 6-3 lead in the 6th inning #PapaSlam