According to his agent, Alan Herman, Tretter fractured the lower end of his fibula and tore ligaments in his ankle during OTA practice on Monday. The injury occurred during a fumble recovery drill as Tretter's cleat got stuck in the turf as he attempted to slide for a ball. Tretter is expected to undergo surgery this week and could miss up to six months. Herman questioned the Packers' decision to run the drill.
"Why they're practicing a fumble drill, I don't know," Herman said, via the Journal Sentinel. "There's not supposed to be contact. That's a silly drill. Why have big 300-pound guys slide like that in OTAs?"
Tretter, a fourth-round pick in the 2013 NFL Draft, was expected to play a backup role for the Packers this season. While his recovery will most likely continue into the season, Tretter may be back by the end of the year. He will likely open training camp on the physically unable to perform list. If he remains on the PUP list to begin the season, he would be eligible to return after six games.