Indianapolis Colts quarterback Carson Wentz was unable to finish Sunday's game with a sprained right ankle and will require further evaluation on Monday.
Indianapolis blew a late lead and lost 27-24 to the Los Angeles Rams.
Wentz was injured when he collapsed awkwardly under the weight of Rams defensive tackle Aaron Donald.
"He rolled it up pretty bad. I kind of had a sense when we walked off the field because I saw that it didn't look good," Colts coach Frank Reich said. "The longer we were off the field there it just stiffened up. He tried, but there was no chance."
Backup Jacob Eason entered the game for Wentz but threw a costly interception that helped the Rams seal the game.
--Tests are required to determine the exact nature of the rib injury that forced Dolphins quarterback Tua Tagovailoa to miss most of Miami's loss to the Buffalo Bills, coach Brian Flores said.
"They are getting tests done on Tua. We don't know the severity of the injury now," Flores said.
Jacoby Brissett stepped in for Tagovailoa, who was blasted by Bills defensive end A.J. Epenesa while attempting to complete a pass on fourth down on Miami's second possession.
Tagovailoa was assisted by trainers, who helped him walk to the sideline and later loaded the second-year quarterback onto a cart and taken to the locker room.
NFL Network reported X-rays were negative and described the injury as bruised ribs.
He completed 1 of 4 passes for 13 yards and was sacked twice before exiting.
--Field Level Media