Swift departed Wednesday's practice early with an unspecified injury, Dave Birkett of the Detroit Free Press reports.
It's unclear what exactly Swift may be dealing with, but Birkett noted that the second-year player had a "lighter workload" than fellow Lions running backs in recent sessions, so an injury could be holding him back. Having said that, Swift jogged to the locker room "under his own power." If Swift misses any time in the coming days, Jamaal Williams, Jermar Jefferson and Dedrick Mills will receive more practice reps.