During team drills Joe McKnight tweaked his left ankle. The severity of the injury remains to be determined but McKnight was kept out of team drills and an update on McKnight’s status will be available as soon as possible.

Per Rich Cimini

Backup RB Joe McKnight sprained his left ankle Monday and sat out of team drills Tuesday. McKnight is the top candidate to return kickoffs, and he’s also being considered for the Wildcat package, along with rookie Jeremy Kerley and LaDainian Tomlinson.

Source : Rich Cimini Twitter