EDEN PRAIRIE, Minn. -- The Minnesota Vikings were still waiting on many of their injured players to get back on the practice field on Thursday, and coach Leslie Frazier is holding out hope that several of them will be able to practice Friday and play Sunday against the Philadelphia Eagles.

Chief among those players are running backs Adrian Peterson and Toby Gerhart, both of whom sat out again on Thursday. Peterson worked his sprained right foot in a pool, and will try to practice on Friday. Frazier still sounded more optimistic about the chances of Gerhart, who has a strained hamstring, playing than he did about Peterson. "[We need] to see if he can burst a little bit with a hamstring," Frazier said.

Frazier said the Vikings could wait until Sunday before declaring Peterson or Gerhart out for the game, depending on how they look Friday, but it's safe to say both running backs would have to give the Vikings some hope with how they look on Friday.

Asked about Peterson's chances, Frazier said, "Everything he's done has been in a pool, so it would be premature for me to suggest that it was possible. We'll have to wait and see."

Tight end John Carlson still has not cleared NFL concussion protocol, and if he doesn't do so in time to practice on Friday, he would likely miss Sunday's game as well. Cornerback Xavier Rhodes missed his second day of practice, and will be "touch-and-go" with his sprained ankle, Frazier said. Given how well Rhodes has played in the last two weeks -- and how tall of a task the Vikings will have against the Eagles' offense -- the rookie might be nearly as important as the two running backs.

Here is the Vikings' full injury report:

• Did not practice: RB Adrian Peterson (groin/foot); RB Toby Gerhart (hamstring), CB Xavier Rhodes (ankle), TE John Carlson (concussion), CB Josh Robinson (chest), G Brandon Fusco (knee).

• Limited participant: LB Larry Dean (knee).

• Full participant: LB Chad Greenway (wrist).