However, Peterson said he expects to play, with Philadelphia Eagles running back LeSean McCoy "within reach" in the pursuit of the 2013 NFL rushing title Coach Leslie Frazier said Peterson was limited in Friday's practice but "should be" able to play.
Denver Broncos wide receiver Wes Welker is expected to miss the rest of the regular season with a concussion, ESPN reported.
Welker will reportedly be officially ruled out of this Sunday's game against the Houston Texans, which means he will miss his second straight game.
The 32-year-old veteran suffered a concussion -- his second of the season -- on Dec. 8 in a 51-28 victory over the Tennessee Titans.
Baltimore Ravens quarterback Joe Flacco was officially listed as questionable on the injury report because of a sprained left knee, but he is expected to play on Sunday against the New England Patriots, the Baltimore Sun reported.
Flacco was injured during the Ravens' 18-16 victory over the Detroit Lions on Monday.
Running back Ray Rice, who missed practice Wednesday because of a thigh injury, was also listed as questionable but he's expected to play.
Chicago Bears linebacker Lance Briggs was medically cleared to play but he is questionable for Sunday's game at the Philadelphia Eagles.
Briggs has been out for eight weeks with a shoulder fracture. He was injured October 20 against the Washington Redskins.
Philadelphia Eagles cornerback Brandon Boykin has been cleared to play, according to the Philadelphia Daily News.
Boykin, the Eagles' nickel corner, sustained a head injury during a second-half kickoff return in last Sunday's 48-30 loss to the Minnesota Vikings.
The Jacksonville Jaguars have signed defensive tackle Jordan Miller and wide receiver Lamaar Thomas to the active roster and placed wide receiver Jeremy Ebert on injured reserve.