San Francisco 49ers running back Jerick McKinnon was hurt on the final play of a team workout Saturday, and a source told ESPN's Adam Schefter that the fear is a torn ACL. McKinnon is scheduled to have an MRI later Saturday to determine the extent of the injury. Niners coach Kyle Shanahan said McKinnon made a cut on air and immediately went down awkwardly. Read more http://www.espn.com/nfl/story/_/id/24548405/jerick-mckinnon-san-francisco-49ers-knee-injury
