Barner departed Friday's practice after suffering a lower-body injury while fielding a punt, John Reid of The Florida Times-Union reports.
Barner limped to the locker room, indicating it's a lower-body injury, but there are no other details about the nature of his issues. The 31-year-old is battling for a roster spot in Baltimore after spending the last three years with four different teams, so his best path to a roster spot is by returning kicks and punts.