Bradford, who has missed two games with a high left ankle sprain, worked in 7-on-7 drills as well as doing some individual work.
"He's as questionable as you can be," Rams coach Steve Spagnuolo said. "He was limited in practice. Some things we kept him out of, some things we let him go. Now the deal is let's see how it is tomorrow after he's done a little more work. We'll take it one day at a time and see where we're at on Sunday."
If Bradford does not play, the Rams will again start A.J. Feeley. In the Rams' first win of the season last Sunday, Feeley threw for 175 yards and a touchdown on 20 of 37 passing against New Orleans. This weekend's NFC West matchup pits two teams that are 1-6.
Spagnuolo and offensive coordinator Josh McDaniels have discussed the possibility about using Bradford against the Cardinals. Bradford has not lobbied to play, Spagnuolo said.
"I'm sure that's coming," Spagnuolo said. "He's a competitor. We'll see where we're at."
Bradford declined to speak to reporters after practice.
McDaniels acknowledged he would like to see Bradford and recently acquired receiver Brandon Lloyd.
"It'll be fun. They're excited. A.J.'s done a great job filling in and if and when that happens, soon, I think those two guys, they're kind of giddy," McDaniels said. "They're like two kids out here that haven't really got to play with each other, so they're excited and I think Sam's just eager and champing at the bit to get out there and play, period. And the fact that he hasn't had an opportunity to play and practice with Brandon yet, I know he'll be excited for that opportunity."
Running back Steven Jackson, who had 159 yards and two touchdowns on 25 carries against the Saints, said the team is comfortable with Feeley's command of the offense.
"He's doing a good job," Jackson said. "He's been a starter in this league. The one thing I can say is that our game plan doesn't change if Sam won't go or A.J.'s up. ... He managed the game well last week and he does a good job of also getting us out of plays that might not be favorable if a defense shows us something that's going to take away a play."
The Rams do have other injuries besides Bradford.
Receiver Mark Clayton will not be made active this week, Spagnuolo said. After injuring his knee last season, Clayton was placed on the PUP list this year. Last week in practice, he sustained an Achilles tendon injury that has hampered him. St. Louis has until Wednesday to decide what to do with him.
There have not been any roster moves last week or this week.
"It's a little soothing, so to speak," Spagnuolo said. "Because when you're juggling all the time, it makes it tough. And I think there's a little bit of sense of continuity and guys kind of feeding off of each other when you've got the same people in there these two games in a row. We really haven't had that in a while."