Samuels isn't a lock to make Pittsburgh's season-opening roster, Bob Labriola of the team's official site reports.
Samuels caught one of two targets for 16 yards in Sunday's 28-10 loss to the Ravens.
Samuels ran three times for seven yards and caught four passes for 32 yards in Sunday's 16-10 loss to the Jets.
Samuels lost one yard on two carries and caught his only target for five yards in Sunday's 17-10 loss to the Bills.
Samuels (groin) returned to practice Thursday as a full participant, saying he expects to play in Sunday's game against the Bills, Brooke Pryor of ESPN.com reports.
Samuels (groin) took part in practice Thursday, Missi Matthews of the Steelers' official site reports.
Samuels (groin) didn't practice Wednesday.
Samuels suffered a groin injury during the Steelers' Week 14 win at Arizona, Brooke Pryor of ESPN.com reports.
Samuels ran seven times for 16 yards and caught both his targets for 18 yards in Pittsburgh's 23-17 win over Arizona on Sunday.
Samuels ran for 32 yards on seven carries and had two catches for 22 yards during Sunday's 20-13 win over the Browns.