As expected, the Green Bay Packers placed center J.C. Tretter on injured reserve with a designation for return.
The move opened up a roster spot for the Packers, who quickly filled that spot by signing center Garth Gerhart off of the teams practice squad. The Packers then signed guard Josh Allen to the practice squad to fill the open spot.
Tretter won’t be able to return to action until after eight weeks. He is eligible to resume practicing after six weeks.
The 23-year-old Tretter spent the entire offseason and training camp working as the starting center before suffering a left knee injury in the team’s third preseason game against Oakland on Aug. 22.
Rookie Corey Linsley takes his place in the starting lineup.
Gerhart is a first-year player out of Arizona State. He was on Green Bay’s practice squad at the end of the 2012 season and the final 12 weeks and playoff game in 2013. He originally entered the league as a non-drafted free agent with the Cleveland Browns in May of 2012.