Dolphins Sign DT Keith Cooper Off Panthers PS

They had three open roster spots. Cooper’s a familiar face who’s had multiple stints in Miami. 

Cooper, 23, was a three-star recruit and the No. 48-ranked edge in the 2021 recruiting class out of Dickinson, Texas. He committed to Tulane and transferred to Houston after three seasons.

He originally signed on with the Lions as an undrafted free agent in October 2025. The Browns eventually signed him to their practice squad in December and he bounced on and off their roster.

The Dolphins signed him to a futures deal in January and he wound up cracking their active roster. However, Miami waived him in October and he signed on with the Panthers’ practice squad.

In 2026, Cooper has appeared in three games for the Dolphins and recorded one tackle.