The Buffalo Bills’ rough reason just got a little tougher. That’s after Bills rookie quarterback Josh Allen exited Sunday’s meeting with the Houston Texans in the third quarter with an elbow injury, according to Ian Rapoport of the NFL Network.

Before leaving the contest, Josh Allen managed to complete 10 of 17 passes for 84 yards, a respectable showing, considering that he was facing relentless pressure from the Texans’ defense throughout his stay on the field. Allen was sacked twice for a loss of 16 yards.

Allen hurt his elbow when he was hit by the pair of Texans pass rushers in Whitney Mercilus and Jadeveon Clowney.

With Allen out of the game, the Bills were forced to send turnover-prone quarterback Nathan Peterman to the field, who did squander yet another opportunity to prove himself. Peterman finished the game with only 61 passing yards and a touchdown with two interceptions on 6-of-12 completions.

Should Buffalo miss Allen for any amount of time, the team will have to decide whether to continue using Peterman under center or let Derek Anderson take the quarterback reigns temporarily. Anderson was signed by the Bills last Tuesday with the intent of making him mentor Allen and Peterman, but the rookie’s injury may have changed Buffalo’s plans for the veteran signal-caller.

Buffalo, which ended the Houston game with a 20-13 loss, will next face the Indianapolis Colts on the road in Week 7.