GREEN BAY, Wis. -- The Green Bay Packers received some good news about their running game when they returned from their bye week Monday.

Rookie running back Eddie Lacy was cleared following his Week 2 concussion.

Lacy took part in the team's full-pads practice Monday and is expected to play Sunday against the Detroit Lions at Lambeau Field.

It was the first on-field activity for Lacy since he was knocked out of the Sept. 15 game against the Washington Redskins on a helmet-to-helmet hit from safety Brandon Meriweather, who was fined $42,000 for the play. Lacy missed the Packers' Week 3 loss at Cincinnati.

"I thought Eddie practiced well today," Packers coach Mike McCarthy said after Monday's practice. "So it was good to have him back out there. He's full go, and I think the week off definitely helped him."

Eddie Lacy is helped off the field after suffering a concussion on his first carry against Washington in Week 2. AP Photo/Mike Roemer

Lacy was not available to reporters Monday, but last week before the players broke for the bye, he said he had yet to be cleared. He said he didn't remember anything about the hit from Meriweather.

"I didn't know nothing," Lacy said last week. "When I got to sit down on that bench, that's pretty much when I came back."

It's unclear whether Lacy will return to his starting role this week. James Starks, who rushed for 132 yards against the Redskins after Lacy departed, sustained a knee injury against the Bengals and did not practice Monday. Starks' replacement, Johnathan Franklin, appeared to be fine after sustaining a foot injury at Cincinnati and practiced Monday. Franklin rushed for 103 yards -- all in the second half -- against the Bengals, but it was his fourth-quarter fumble that Bengals cornerback Terence Newman returned 58 yards for the game-winning touchdown.

The Packers also added a running back to their roster Monday, promoting rookie Michael Hill from the practice squad. He filled the roster spot that opened when the Packers cut receiver/kick returner Jeremy Ross last week.

The Packers don't have to file an official injury report until Wednesday, and McCarthy wouldn't give any details about Starks, tight end Jermichael Finley (concussion) or linebacker Clay Matthews (hamstring). None practiced Monday.