Allen was placed on the Physically Unable to Perform list by the Dolphins on Sunday.
Allen was unable to participate in any offseason work while dealing with an undisclosed injury, and he now heads to the PUP list before training camp opens. Given the injury designation and lack of details regarding Allen's health, it's unclear how long he might be out for. Mike Gesicki figures to open training camp unopposed as Miami's No. 1 tight end.