ALAMEDA -- Raiders coach Dennis Allen said Monday that quarterback Terrelle Pryor's right knee injury was more severe than he realized. Even so, that wasn't the determining factor in the Raiders loss to the New York Giants.

"When you watch the game, I didn't look at it and think that that was really the limitation that held us back there," Allen said Monday in his weekly day-after-game news conference.

Just the same, Allen said he intends to meet with Pryor so he can get a full grasp of where the quarterback stands in terms of health. He is questionable for Sunday's game at the Houston Texans, with his status likely to be determined after Wednesday's practice.

Pryor completed 11 of 26 passes for 122 yards, with one interception, in a 24-20 loss Sunday. He also ran only five times for 19 yards and fumbled once.

Afterward, Pryor said that he played with a sprained medial collateral ligament that he suffered against the Philadelphia Eagles on Nov. 3. The knee worsened as the week progressed.

"It was obvious that there wasn't that explosiveness that we had seen out of him prior to the injury," Allen said. "I'll sit down and visit with Terrelle a little bit more and find out exactly where he is physically.

"It wasn't something that we thought was going to be a big factor going into the game. But, obviously, it was a factor."

Allen said he admires Pryor for wanting to play at less than 100 percent, as he does with all his players.

At the same time, he added, there's a fine line between playing through pain and knowing when to ask out.

"You got to be effective," Allen said. "If you're injured and can't help the football team, then it's best that we have somebody else in there."

Allen said he didn't consider removing Pryor from the game Sunday, either because of Pryor's limited effectiveness or inconsistent play. Pryor remains the unquestioned starter as long as he's healthy enough.

Terrelle Pryor #2 of the Oakland Raiders scrambles as Jason Pierre-Paul #90 of the New York Giants defends at MetLife Stadium on November 10, 2013 in East
Terrelle Pryor #2 of the Oakland Raiders scrambles as Jason Pierre-Paul #90 of the New York Giants defends at MetLife Stadium on November 10, 2013 in East Rutherford, New Jersey. (Photo by Elsa/Getty Images)

Undrafted free agent Matt McGloin is the only other quarterback on Oakland's 53-man roster. Fourth-round draft pick Tyler Wilson is on the practice squad.