Steelers' Elandon Roberts: Estimated as non-participant

Roberts (pectoral) was listed as a nonparticipant on the Steelers' practice estimate Tuesday, Brooke Pryor of ESPN.com reports.

Roberts sat out of Sunday's win at Seattle due to a pectoral injury, and now his availability for Week 18 is in doubt. He'll probably need to practice Wednesday or Thursday to have a chance to play Saturday.