Bell (knee) wasn't spotted at practice Thursday, David Furones of the South Florida Sun Sentinel reports.
Singleton recorded six tackles (two solo) during the Broncos' 26-21 win over the Panthers in Week 9.
Brooks recorded 12 tackles (four solo) during Sunday's 19-9 loss versus the Lions.
Rodriguez recorded 10 tackles (seven solo) including 1.0 sacks during Sunday's 19-9 loss versus the Lions.
The Dolphins designated Baker (knee) for return to practice from the reserve/PUP list Wednesday, Barry Jackson of the Miami Herald reports.
Kacmarek (quadriceps) did not practice Wednesday, C. Isaiah Smalls II of the Miami Herald reports.
Wright (quadriceps) was a full participant in Wednesday's practice, C. Isaiah Smalls II of the Miami Herald reports.
Bell (knee) is listed as a limited participant on Wednesday's injury report, C. Isaiah Smalls II of the Miami Herald reports.
The Dolphins hope Willis (abdomen) will return this year but haven't ruled out season-ending surgery, Joe Schad of The Palm Beach Post reports.
Though Dolphins coach Jeff Hafley said Wednesday that he doesn't have a timetable for the potential return of Willis (abdomen), he does expect the QB back at some point this season, Barry Jackson of the Miami Herald reports.
