The Baltimore Ravens have announced that Aaron Ross tore his Achilles while taking part in a conditioning test this morning.
The cornerback joined the AFC North side as a free agent last month after missing all but four games last season with a back injury.
Head coach John Harbaugh confirmed to reporters that the 31-year-old sustained the injury during a training camp session this morning.
It is expected that the injury will keep him on the sidelines for the entire 2014 season.