Arnold was forced to leave Monday's practice early with an upper-body injury, Kyle Meinke of MLive.com reports.
Arnold played 13 snaps in Thursday's preseason opener against the Giants, failing to record any stats. The cornerback is now dealing with an undisclosed upper-body injury that he suffered at practice Monday, and it's unclear if he'll be forced to miss any additional time as a result. More information on Arnold's status will likely be provided in the near future.