Green Bay - Expect running back Ryan Grant (hamstring) to be listed as questionable when the injury report comes out Friday -- and at this point he's far from a sure thing to play Sunday against the Detroit Lions.

He hasn't been on the sidelines for practice this week for planned rest. He has been rehabbing his hamstring and will test it Friday. If that doesn't go well, he won't play against the Lions.

"That's probably a good question for tomorrow," coach Mike McCarthy said when asked if there was concern Grant won't be able to play. "I know Ryan wants to play, and his communication will be that he'll want to play, I'm sure. But once he practices tomorrow, the information from how he feels Saturday morning factors into it, and Pat McKenzie, Ted and I will make a decision."

The good news is that backup Brandon Jackson (concussion) should be cleared this afternoon. Kregg Lumpkin is also ready should Grant not be able to go.

In other injury news, S Aaron Rouse sprained an ankle during practice but said he's fine. And LB Brandon Chillar had a back spasm but said he will practice Friday.