KR Pyatt sidelined for six weeks
Coach Tony Dungy said Wednesday that initial X-rays and examinations didn't show the fracture, but an MRI taken later did.
Pyatt was injured on Miami's first punt Sunday when Tommy Hendricks made a helmet-to-helmet tackle in the first quarter. Pyatt remained on the ground for several minutes and was taken off, immobilized, on a stretcher. The Colts initially called it a chest injury.
Pyatt leads the AFC in kickoff returns with an average of 28.6 yards. He also averages 9.2 yards on punt returns.
Dungy said the Colts would use wide receiver Troy Walters to return punts and could use several players to return kickoffs at Jacksonville on Sunday.
Wide receiver Brandon Stokley didn't practice Wednesday after he was diagnosed with a mild concussion. Starting left tackle Tarik Glenn isn't likely to practice until later this week after hyperextending his left knee.
Dungy wasn't sure if either player would return Sunday. Both are listed as questionable.
Tight end Dallas Clark is expected to return after missing the last two games with an injured hamstring.
This story is from ESPN.com's automated news wire. Wire index