Amos (ankle) exited Monday's practice early, John Keim of ESPN.com reports.
Amos was activated from the active/PUP list Friday after finally recovering from the lower-leg injury he went down with in Week 10 of last season. The cornerback's return appears to be short-lived, and the ankle issue may very well be partially due to weakness caused by the prior leg injury. It is unclear how long the second-year player will be out and if he will need to miss regular-season time.