Bradford has missed the last two games with a high left ankle sprain, which he suffered on the final offensive play of the Rams' loss at Green Bay on October 16.
He didn't practice Wednesday, but participated on a limited bases the last two days. He competed in team drills Friday but will likely be a game-time decision against the Cardinals.
St. Louis is 1-1 since Bradford went down, getting its first win of the season last week in a 31-21 shocker over New Orleans. A.J. Feeley has started both games and would get the ball again if Bradford can't play.
In other injury news, offensive tackle Jason Smith and defensive tackle Darell Scott will be out again for St. Louis because of concussions. Wide receiver Danario Alexander will miss the game with a hamstring injury and linebacker Bryan Kehl is questionable with a sprained ankle.