Brent Celek sustained a concussion on the first play from scrimmage in Sunday's 23-21 win over the Tampa Bay Buccaneers. Celek was helped off the field after a one-yard catch and returned to the locker room for examination.
"For him to go out, I'll tell you it was a pretty good [hit]," coach Andy Reid said. "He's a tough kid."
Celek won't play Thursday against the Bengals. Clay Harbor will get the start if Celek can't play.