Crisp was removed from Friday's game against the Angels after crashing into the outfield wall while attempting to make a catch, Susan Slusser of the San Francisco Chroncile reports. The collision with the wall was a violent one, but Crisp was able to walk off the field under his own power. While the specific nature of Crisp's injury is unclear, he previously missed time this season with a neck injury. Craig Gentry took over in center field Friday night.