Eddie Lacy inactive for Green Bay Packers vs. Lions

Eddie Lacy got demoted during the week and is officially inactive Sunday.

The Green Bay Packers' running back was questionable with a groin injury and won't see the field versus the Detroit Lions.

Pro Bowl ballot

Coach Mike McCarthy announced this week that James Starks took over the No. 1 running back duties, but planned to use a "1-2 punch" with Starks and Lacy.

Lacy hasn't looked right all season. He's appeared slow, lacked lateral quickness and can't seem to hit holes. The third-year pro insisted this week that injuries (ankle, groin) and added weight weren't the cause for his poor play.

"I honestly don't know what it is," Lacy said earlier this week of his poor play.

The groin injury will keep him out Sunday.

Facing a 30th-ranked Detroit Lions -- allowing 133.8 yards per game -- Starks should see plenty of open field. If the veteran back has a big game, he could keep Lacy as the backup as the Packers push towards the playoffs.

Receiver Ty Montgomery is also inactive for the Packers.