Dolphins sign Cooper Jr.

The Miami Dolphins announced today that they have signed defensive lineman Keith Cooper Jr. to the active roster off Carolina's practice squad.

Cooper Jr. has appeared in four career games with Cleveland (2025) and Miami (2026), recording one tackle. He first joined the Dolphins on Jan. 9, 2026, and spent the first three weeks of the season on Miami's active roster. Cooper Jr. entered the NFL as an undrafted college free agent with Detroit in 2025 and spent time on the practice squad with the Lions and the Browns. He finished his collegiate career at Houston (2024), where he started 12 games and recorded 46 tackles (25 solo), 3.5 sacks, 8.5 tackles for loss, two passes defensed and one…