Buccaneers defensive end George Johnson appeared in a career-high 16 games in 2014 for the Lions, but he made no starts. He mostly was a rotational pass rusher last year, but the job seemed to suit him well, as he totaled a career-best six sacks.
Seferian-Jenkins (shoulder) is listed as doubtful for Sunday's game against the Colts.
Seferian-Jenkins was listed as questionable the previous three weeks, and while he doesn't seem to have suffered a setback, the Bucs are finally being realistic about his chances of playing. At this point, it's not clear that he will play again this season, as he still needs to rebuild strength in his shoulder and arm.
Claiborne (hamstring) has been ruled out for Sunday's game in Miami, Armando Salguero of the Miami Herald reports.
With Claiborne unavailable, Byron Jones figures to primarily work as a cornerback, which should free up some extra snaps for safeties Jeff Heath and J.J. Wilcox. Claiborne isn't particularly good, so his absence isn't cause to significantly downgrade the Dallas defense.
Romo will miss the remainder of the season after being diagnosed with a hairline fracture to his left clavicle Friday, Brandon George of The Dallas Morning News reports.
Romo's clavicle won't actually require surgery but he'll still need to sit out the rest of the season after sustaining the break during Thursday's loss to the Panthers. Matt Cassel will seemingly take over from here on out as the Cowboys fade out of playoff contention after Romo's second left clavicle injury in just a matter of months.