Packers C J.C. Tretter underwent knee surgery on Tuesday.
According to Tom Silverstein of the Milwaukee Journal-Sentinel, Packers C J.C. Tretter is expected to miss "several weeks" with a sprained MCL.
Packers C J.C. Tretter is dealing with a "mild" MCL sprain.
Packers coach Mike McCarthy said J.C. Tretter will open the season as the team's starting center.
Packers activated C J.C. Tretter from injured reserve/designated for return.
Packers placed C J.C. Tretter (knee) on injured reserve/designated to return.
The Packers are expected to place C J.C. Tretter (knee) on injured reserve/designated to return.
Packers C J.C. Tretter's (knee) timeline is 5-6 weeks.
Packers C J.C. Tretter is out "multiple weeks" with a knee injury.
Second-year pro J.C. Tretter appears to have won the Packers' starting center job.
J.C. Tretter is expected to get the first shot at the Packers' starting center job.
Packers activated OL J.C. Tretter (ankle, leg) from the reserve/PUP list.
Packers placed OL J.C. Tretter (broken ankle) and S Sean Richardson (neck) on the reserve/PUP list.
Packers fourth-round OL J.C. Tretter is out six months after suffering a fracture at the lower end of his fibula and torn ankle ligaments during OTA practice.