Colt Brennan underwent successful surgery on his hip this week in Colorado, head coach Jim Zorn said.
Brennan, who is on injured reserve, was expected back at Redskins Park on Friday.
"It was a similar surgery that he had on his other hip [in 2008]," Zorn said. "It was a small labrum tear and it was said to be the reason he kept pulling his hamstring. He got that repaired."
It's estimated that Brennan can resume running and working out in three months.
"He's a gym rat, though, so he is going to be around," Zorn said. "He isn't going to be like, 'I will see you all next fall.'"
The Redskins began the season with just two quarterbacks on the 53-man roster, Jason Campbell and Todd Collins. Third-stringer Andre Woodson is on the practice squad.
-- MONTGOMERY QUESTIONABLE
Anthony Montgomery is the Redskins' chief injury concern heading into the Week 2 game against the St. Louis Rams.
Montgomery has been slowed by tendonitis in his patella, Jim Zorn said. He sat out Friday's practice and was listed as questionable for the Rams game.
"I think he may be ready to go, but he just has a little roughness in his knee," Zorn said.
Chris Samuels (knee), Fred Smoot (rib) and Robert Henson (illness) are listed as probable.