The Miami Dolphins added defensive lineman Keith Cooper Jr. to their active roster today, signing him off Carolina's practice squad and giving Miami an immediate depth move on the defensive line.
The timing matters because Cooper has only four career NFL games on his ledger and one tackle, yet Miami decided he was worth a roster spot now. He first joined the Dolphins on Jan. 9, 2026, spent the first three weeks of the season on Miami's active roster, and has already been through the kind of churn that defines the back end of an NFL roster.
That climb has been quick and uneven. Cooper entered the league as an undrafted college free agent with Detroit in 2025, spent time on the practice squad with the Lions and the Browns, and has now surfaced with Miami after another stop on Carolina's practice squad. The move adds a player who has already seen the league from multiple angles, even if the production sheet remains thin.
His college résumé is why he keeps getting another look. Cooper finished at Houston in 2024 after transferring from Tulane following the 2023 season, and he made the most of that final year with 12 starts, 46 tackles, 3.5 sacks, 8.5 tackles for loss, two passes defensed and one fumble recovery. Before that, he played 39 career games with 15 starts at Tulane from 2021 to 2023 and totaled 73 tackles, 10.5 sacks, 16 tackles for loss, five passes defensed and one forced fumble.
What Miami is buying is projection, not proof. The Dolphins are carrying a defensive lineman with SEC-style volume from Houston and a longer track record at Tulane, but the NFL sample is still just four games and one tackle. That makes the roster move notable on its own: Miami is trusting the college production and the roster familiarity enough to move him straight onto the active roster, even though his professional résumé is still in its earliest stage.
The broader picture is straightforward. Miami is turning over the bottom of its roster and giving Cooper another chance to make the leap from a player who has bounced through Detroit, the Lions, the Browns, Houston and Tulane into someone who can hold a permanent place. The next question is not whether he has a pedigree. It is whether he gets enough snaps to turn this latest move into something more lasting.
