Rams QB Sam Bradford will not play in Sunday's game against the Bengals, and he may be shut down for the rest of the season.
Bradford played through a high ankle sprain last Monday night in a loss to the Seahawks. He has already missed three games this season.
Last year's Offensive Rookie of the Year has struggled, throwing only six touchdowns and six interceptions this season. He has completed 53.5 percent of his passes.
Kellen Clemens will start on Sunday against the Bengals.
ESPN's Adam Schefter reported that the Rams are likely to keep Bradford out for the rest of the season.