We learned earlier this week that Packers defensive lineman Muhammad Wilkerson was done for the season after undergoing surgery. Today, the team officially placed the 28-year-old on the injured reserve, according to Packers.com. Cornerback Tony Brown has been promoted from the practice squad to take the open roster spot.

Wilkerson suffered some sort of ankle ailment last Sunday’s contest, and the injury has only been described as “significant.” It’s a tough blow for Wilkerson, who was looking to recoup his free agent value after two straight underwhelming seasons. The veteran signed a one-year, $5MM deal with the Packers this offseason, and he had the ability to make an additional $3MM via incentives. The former first-round pick failed to impress through his first three games with Green Bay, compiling only five tackles. For the time being, the team will have to turn to Dean Lowry to start alongside Mike Daniels.

Wilkerson was once one of the top defensive players in the NFL, but he’s seen a decline in production since inking a lucrative extension with the Jets back in 2016. Wilkerson reportedly had problems with effort, tardiness, and coaches during his last few years in New York. Last year, the lineman appeared in 13 games, but he graded as just the 50th-best interior defender in the league, per Pro Football Focus.

Brown, an undrafted free agent out of the University of Alabama, signed with the Packers’ practice squad after being cut by the Chargers. He was touted for his special teams ability during his time in college.