EDEN PRAIRIE, Minn. -- Adrian Peterson is all but a certainty to play on Sunday.
Minnesota's rookie running back was listed as probable after Friday's practice to return to the field against Detroit after missing two games because of a torn lateral collateral ligament in his right knee.
"He had some soreness, which you would expect ... just from the inactivity," coach Brad Childress said.
Peterson said on a scale of one to 10, his soreness was a one.
"It's not going to slow me down," Peterson said. "I'm going to be out there going full speed. It's just a matter of feeling what it's like when I get hit."
Despite the two-game absence, Peterson still leads the league in rushing with 1,081 yards and is also first in the NFL at his position for Pro Bowl votes by fans.
Wide receiver Troy Williamson was listed as doubtful for Sunday's game because of lingering effects from a concussion. He missed Thursday's practice with persistent headaches and didn't participate on Friday, either.
Backup safety Tank Williams was ruled out with a knee injury, and backup linebacker Dontarrious Thomas (groin) and cornerback Antoine Winfield (hamstring) were down as questionable.
Defensive end Kenechi Udeze had another excused absence Friday related to the recent birth of his daughter, but Childress said he expected him to play against Detroit.