The Panthers placed Sullivan (knee) on practice-squad injured reserve Tuesday.
Sullivan (knee) is doubtful to return to Sunday's contest against the Buccaneers, Darin Gantt of the Panthers' official site reports.
The Panthers signed Sullivan to the practice squad Tuesday, Mike Kaye of The Charlotte Observer reports.
Sullivan was cut from the Panthers' practice squad Thursday, Darin Gantt of the team's official site reports.
Sullivan signed with the Panthers' practice squad Monday, Darin Gantt of the team's official site reports.
Sullivan (quadriceps) worked out for the Giants on Monday, Aaron Wilson of KPRC 2 Houston reports.
The Panthers released Sullivan (quadriceps) from injured reserve with an injury settlement Thursday, Aaron Wilson of KPRC 2 Houston reports.
Sullivan (quadriceps) was placed on injured reserve Thursday, David Newton of ESPN.com reports.
Sullivan didn't catch either of his two targets in Sunday's 26-0 loss to the Jaguars.
Sullivan caught three of five targets for 21 yards in Sunday's 33-30 loss to the Packers.