Police in Sioux Falls, S.D., said on Friday that a 2-year-old son of Minnesota Vikings running back Adrian Peterson died from injuries sustained in an alleged assault by the boyfriend of the child's mother, mulitple media outlets reported.
The Minneapolis Star-Tribune first reported the child's death, and it was confirmed by Reuters.
Peterson returned to practice Friday, but did not directly address reports regarding his son.
Peterson missed practice Thursday to deal with a medical issue involving a young family member.
"I really appreciate all the support that I've been receiving from fans, the Vikings organization," Peterson said. "This is a private matter and I would ask you all to please just respect my privacy and not ask at all about the situation at hand. Thanks. Appreciate it."
Peterson said he will definitely play Sunday's game against the visiting Carolina Panthers.
Peterson's father, Nelson Peterson, told the St. Paul Pioneer-Press earlier Friday that the child is one of Peterson's sons.
Peterson's 2-year-old son was reportedly rushed to a hospital and medical experts determined the injuries were consistent with abuse.
Joseph Robert Patterson, 27, was being held on bail set at $750,000 in cash at the Minnehaha County Jail. He was charged with aggravated assault and battery of an infant.
---Quarterback Matt Cassel will start for the Minnesota Vikings against the Carolina Panthers on Sunday, coach Leslie Frazier confirmed.
Christian Ponder returned to practice this week following a rib injury that sidelined him for the Vikings' last game, but Cassel was expected to start after leading Minnesota to its first victory of the season two weeks ago in London.
Josh Freeman, signed Monday, is still getting acclimated to the playbook and isn't likely to be active Sunday.
---Chicago Bears linebacker D.J. Williams suffered a ruptured left pectoralis muscle tendon during Thursday's game against the New York Giants and will miss the rest of the season, the team announced.
Rookie Jon Bostic replaced Williams against the Giants.
---The Jacksonville Jaguars ruled out quarterback Blaine Gabbert and four other players for Sunday's game against the Denver Broncos.
Gabbert strained his left hamstring in the third quarter of last Sunday's 34-20 loss to the St. Louis Rams.
Chad Henne, who filled in for Gabbert after he was hurt, will start.
---Denver Broncos veteran cornerback Champ Bailey will make his season debut Sunday against the Jacksonville Jaguars.
Bailey has been out since injuring his left foot during the Aug. 17 preseason game against the Seattle Seahawks.
---New York Jets tight end Kellen Winslow has been suspended four games for violating the NFL policy on performance enhancing substances.
What substance Winslow tested positive for wasn't immediately known.
---Jets cornerback Antonio Cromartie did not participate in Friday's practice after suffering a non-contact injury to his knee the previous day and is officially listed as questionable.
Wide receiver Santonio Holmes was ruled out against Pittsburgh due to foot and hamstring injuries.
--- Philadelphia Eagles quarterback Michael Vick practiced fully on Friday, and there remains an outside chance he will start this week's game.
Vick, who suffered a hamstring injury last week, is still listed as questionable by the Eagles. It may be a game-time decision.