PHILADELPHIA, Nov. 26 (UPI) -- Philadelphia Eagles quarterback Koy Detmer will not undergo an MRI Tuesday because he is unable to straighten the injured elbow on his non-throwing left arm.
X-rays did confirm that Detmer suffered a dislocated elbow in the Eagles' 38-17 victory at San Francisco Monday night. An MRI was scheduled to see if there was further damage.
Eagles Coach Andy Reid said that it might be a couple of days before Detmer can straighten his elbow.
"We don't know how long that it will take for him to extend that arm," Reid said Tuesday. "It will really be a struggle for him to have a chance to play this week."
Already without star quarterback Donovan McNabb for possibly the remainder of the season with a fractured ankle, the Eagles will be left with third-stringer A.J. Feeley to start next Sunday's game against the St. Louis Rams.
Philadelphia (8-3), which reached the NFC championship game last season, has a two-game lead in the NFC East, and is in contention for homefield advantage throughout the playoffs.
Making his first start since late in the 1999 season, Detmer was injured after landing hard on his left arm following a 24-yard completion to tight end Jeff Thomason with 3:32 left in the third quarter.
Detmer played well in McNabb's absence. He completed 18-of-26 passes for 227 yards and two touchdowns while also scoring on a one-yard sneak.
Without McNabb and now Detmer, the Eagles' playoff chances likely will rely on Feeley, a fifth-round pick in 2001, who has played in three career games.
After replacing Detmer against the 49ers, Feeley completed all three of his passes for 17 yards, including a one-yard scoring toss to tight end Chad Lewis.