Johnson (thigh) is listed as questionable for Sunday's game in Cincinnati, Nick Wagoner of ESPN.com reports.
If Johnson isn't able to play, LaMarcus Joyner and Marcus Roberson will likely take on additional snaps. It would be a tough break for the Rams, though none of the bunch warrants serious IDP considerations.
Keenum (concussion) will not start Sunday's game against the Bengals, Ian Rapoport of NFL.com reports.
Keenum remains in the league's concussion protocol, and he'll be held out Sunday after taking a hit to the head late in last week's loss to Baltimore. The Rams had initially hoped that Keenum would be cleared in time to play Sunday, but they'll hand the reins of the offense back over to Nick Foles, who was benched after nine uninspiring games as the starter.
Quinn (hip) is listed as questionable for Sunday's game in Cincinnati, Nick Wagoner of ESPN.com reports.
Quinn missed a Week 11 game in Baltimore and hasn't handled a full snap count since Week 5. His presence, even in a limited capacity, would likely be useful to the Rams, but there's no shortage of superior IDP options.
Zuerlein (groin) is listed as questionable for Sunday's game in Cincinnati, ESPN's Nick Wagoner reports.
Zuerlein presumably suffered the injury during Friday's practice, as he was a late addition to the final injury report. Even if he's able to play, he's attached to a terrible offense that has a highly difficult matchup.
Bailey has been suspended four games for violating the NFL Policy and Program for Substances of Abuse.
With Bailey -- who has recorded 12 catches for 182 yards and a touchdown in eight game to date -- set to miss time, it's now understandable that the Rams are expected to work out wideouts Hakeem Nicks, Wes Welker and Vincent Brown, per ESPN's Adam Caplan.
Brown (hamstring) is listed as probable for Sunday's game against the 49ers, CSN Bay Area reports.
Brown may still be somewhat bothered by his hamstring, but the injury didn't stop him from playing a full complement of snaps in Week 11 against the Bengals. He could, however, lose a few of those snaps to Michael Floyd (hamstring), who is listed as questionable for Sunday's game in San Francisco.
Bucannon (concussion) is listed as questionable for Sunday's game in San Francisco, CSN Bay Area reports.
According to Darren Urban of the Cardinals' official website, head coach Bruce Arians said the team will be careful with Bucannon, who probably won't be needed in this matchup. There's still some chance the safety/linebacker suits up, but it sounds as if the Cardinals are more inclined to wait a week.
Cardinals defensive end Calais Campbell was a one-man wrecking crew Sunday against the Rams, racking up 11 tackles (10 solo), three tackles for loss, two quarterback hits, and 0.5 sacks.
Campbell was everywhere in Week 4, but the Cardinals' defense itself was unable to force a turnover, after accumulating seven (all interceptions) over the course of the first three weeks of the season. Stuck in the 50-to-75 tackle territory in each of the past five campaigns, he currently has 25 to his credit, which is a career-best pace. On the other side of the coin, the half sack Sunday was his first in the category in 2015, so he has some work to do to uphold his standard (6-to-9 sacks in six consecutive seasons).
Fitzgerald (ankle) is listed as probable for Sunday's game in San Francisco, CSN Bay Area reports.
Fitzgerald returned to a full practice Friday, following limited sessions Wednesday and Thursday. He'll square off against one of the NFL's worst defensive backfields, but the matchup may lead to a heavy dose of Arizona's Chris Johnson-led running game.
Floyd (hamstring) is listed as questionable for Sunday's game in San Francisco, CSN Bay Area reports.
A limited participant throughout the week of practice, Floyd should be available for Sunday's game, according to Darren Urban of the team's official website. However, Floyd seems to be the least healthy of Arizona's three main wide receivers, and the matchup probably won't require high volume from the passing game. Assuming he suits up and doesn't suffer a setback, Floyd will be a much more attractive option in Week 13 against the Rams.
Johnson (knee) is listed as probable for Sunday's game in San Francisco, CSN Bay Area reports.
Following limited sessions Wednesday and Thursday, Johnson logged a full practice Friday. He should be cleared for his usual workload against a 49ers defense that he ripped for 22-110-2 back in Week 3.
Peterson (ankle) is listed as questionable for Sunday's game in San Francisco, CSN Bay Area reports.
According to Darren Urban of the Cardinals' official website, head coach Bruce Arians said Friday that he expects Peterson to play in Sunday's game. The star cornerback missed practice Wednesday and Thursday, but he then returned as a limited participant Friday morning. There is some chance Peterson will be active but play fewer snaps than usual.