Keith Cooper Jr. is back with Miami. The Dolphins announced on Sept. 30 that the defensive lineman had been signed to their practice squad.
Cooper already knows the team: his first Miami stint began Jan. 9, and he stayed through the offseason, training camp and the season’s opening three weeks.
The 23-year-old has one tackle across four NFL appearances for Cleveland and Miami. Detroit brought him into the league as an undrafted rookie in 2025; he later spent time on the Browns’ practice squad.


