The Cowboys placed Diggs (knee) on the active/PUP list Thursday, Todd Archer of ESPN.com reports.
Archer also noted that Diggs' stay on the active/PUP list is not expected to be long, but he'll begin Dallas' camp there as he continues to recover from a torn ACL. Once the Alabama product is able to return to the field, the Cowboys should have one of the best cornerback duos in football in DaRon Bland and Diggs.