Agent estimates Packers rookie out six months with broken ankle

J.C. Tretter, an offensive lineman from Cornell, was the Packers' fourth-round draft pick. (Mike McGinnis/Getty Images)

J.C. Tretter, the Packers' fourth-round pick in this year's draft, is expected to miss six months after breaking his ankle, according to his agent, Alan Herman  via ESPN.

The agent said the offensive lineman from Cornell suffered the fracture to his right ankle during a fumble recovery drill during OTAs Monday.

The Packers had Tretter working at right tackle during rookie orientation camp two weeks ago.

“They were doing a fumble recovery drill. Unfortunately his cleat got stuck in the turf and he broke his ankle,” Herman told ESPN Tuesday afternoon.

Herman said Tretter's injury appears to be similar to the one former Packers running back Ryan Grant -- another client of Herman's -- suffered during the 2010 regular-season opener at Philadelphia.