Summary: Core stability training has become popular in recent years, but can it actually prevent musculoskeletal injuries? Dr. Geier also discusses the injuries of Baltimore Orioles third baseman Manny Machado, University of South Carolina defensive end Jadeveon Clowney, Oakland Raiders quarterback Terrelle Pryor, and Arizona Cardinals safety Rashad Johnson. Plus in the Ask Dr. Geier segment, he answers your sports medicine questions.