Ayers (ankle) practiced in a limited capacity on Wednesday, Greg Auman of the Tampa Bay Times reports.
Ayers participated for the first time since suffering the ankle injury Week 2, albeit in shorts as the Buccaneers limited his activity. If he's unable to return to game action Sunday against the Raiders, Noah Spence figures to once again get the start at defensive end.
Martin (hamstring) didn't practice Wednesday, Greg Auman of the Tampa Bay Times reports.
Already beset by one setback, Martin will be treated with kid gloves by the Buccaneers as he rehabilitates the balky hamstring that has sidelined him since Week 2, per Auman. As a result, the training room will be Martin's domain until he's cleared to return to the practice field. In the interim, the Bucs will entrust Jacquizz Rodgers with a particularly hefty workload, which has equated to 56 carries for 255 yards and six catches for 37 yards over the last two contests.
McDonald (hamstring) was a limited participant in practice on Thursday, Jenna Laines of ESPN.com reports.
McDonald missed Week 7's win over the 49ers due to a hamstring aliment. His limited participation the past two days makes him questionable for Sunday's tilt with the Raiders, but his status in Friday's practice session will be key in determining his availability. Should he be ruled out, look for Akeem Spence to get the start.
Bell (concussion) reached an injury settlement with the Buccaneers on Thursday, Aaron Wilson of the Houston Chronicle reports.
Bell suffered a concussion in Week 4's preseason finale against the Redskins, leaving him on the sidelines for an extended amount of time. The team decided to part ways with wideout instead of holding him on IR for the year.
Dixon left Saturday's preseason matchup with an apparent chest injury and is questionable to return, Jonathan Jones of the Charlotte Observer reports.
In his NFL debut last week, Dixon tallied three tackles against Baltimore. The Washington product has taken reps at both cornerback and safety for Carolina in the early going, but with a lot of uncertainty surrounding Dixon and his injury, it remains to be seen if he'll be able to squeak onto the roster by preseason's end.
Johnson (Achilles) was placed on the Panthers' reserve/NFI list on Monday, Steve Reed of the Associated Press reports.
Johnson also began training camp on the active/NFI list after undergoing offseason surgery to repair an Achilles injury suffered last season with the Patriots. Although no timetable was provided for his return, Johnson could theoretically resume playing after the first six weeks of the regular season.