Josh Allen of Buffalo Bills week after week with an injured elbow

ORCHARD PARK, N.Y. – The Buffalo Bills consider rookie quarterback Josh Allen week after week after suffering a right elbow injury during Sunday's 20-13 loss to the Houston Texans.

According to Chris Mortensen of ESPN, Allen's injury is related to the ulnar collateral ligament (UCL) in the right elbow. This is not considered major at the moment, but his MRI will be sent to Dr. James Andrews, renowned orthopedic specialist, for a second opinion, which has become a standard operating procedure. Dr. Leslie Bisson, one of Bills' orthopedic specialists, was a Fellow under the direction of Dr. Andrews.

No other specific information has been revealed, but the Bills do not want to overthrow him, sources told Mortensen, to allow him to heal properly despite his competitive desire to play at a level below his strength.

"We are going to take it one day at a time," Bills coach Sean McDermott said Monday. Allen is currently undergoing appropriate treatment and therapy under the direction of Dr. Bisson and the team's medical staff.

The injury casts doubt on Allen's status for Sunday's game at the Colts of Indianapolis. McDermott said his offensive team and he would "determine" whether Nathan Peterman or Derek Anderson would replace Allen as a starter if he could not play the Colts.

Peterman replaced Allen in the third quarter of Sunday's game and started a touchdown pass to give the Bills a lead. While the match was tied in the fourth quarter, Peterman was intercepted by Texan cornerback Johnathan Joseph, who returned the throw for the decisive touchdown. Peterman was again intercepted because of subsequent possession of the Bills.

Although Peterman launched 10 interceptions in seven regular season and playoff games, McDermott continued to trust Peterman on Monday while leaving Anderson open for the quarterback position.

"I have to find the perfect guy for our football team," McDermott said Monday. "I understand the fans and that feeling, but at the same time, I have to do what we think is best for the football team to progress."

Anderson, 35, signed with the Bills last week after spending the last seven seasons as Cam Newton's replacement with the Carolina Panthers. McDermott and offensive coordinator, Brian Daboll, said Monday that Anderson's game book had been postponed since he had played for a Cleveland Browns attack coordinated by Daboll in 2009.

Chris Mortensen of ESPN contributed to this report.