Adrian Peterson rejoined the Vikings on Friday. (Elizabeth Flores / Minneapolis Star-Tribune / AP Photo)

Update: Adrian Peterson’s son has died

One of the sons of Minnesota Vikings running back Adrian Peterson is in critical condition in a Sioux Falls, S.D., hospital after being beaten Wednesday evening.

The NFL MVP, who left the team Thursday and returned this morning, asked for privacy and provided no details in brief comments to reporters at the Winter Park, Minn., facility. “I really appreciate all the support I’ve received from fans and the Vikings organization,” he said. “This is a private matter and I’m going to ask you all to please just respect my privacy here, not ask at all about the situation at hand. Thanks. ‘Preciate it.”

Peterson said he plans to play Sunday and was “just stayin’ prayed up” during the tragedy. He revealed no information about the 2-year-old. Nelson Peterson, his father, had confirmed earlier that the child is one of his grandsons, but added that it is not Adrian Jr., who often is seen at the Vikings facility. “We are asking for prayers and for respect for our family as we deal with this tragic situation.”

TMZ reported that the child was beaten by his mother’s boyfriend and the Argus Leader reported that Joseph Robert Patterson, 27, had been charged with aggravated assault on an infant. From the Argus Leader:

The child was alone in Patterson’s home at Platinum Valley Apartments, where he’d recently moved with his mother. Patterson called 911 to report a choking on Wednesday evening, but Lt. Blaine Larsen of the Sioux Falls Police Department said it became clear at the hospital that the boy’s injuries were not accidental.

Larsen said the relationship between the mother and Patterson was “fairly new.”

At a press conference Friday morning, Sioux Falls police and county authorities refused to say whether Peterson was the child’s father, but confirmed they’d been in touch with the parents’ “representatives.”

“We’re not here to talk about the parents of this child,” Lincoln County Attorney Thomas Wollman said. “We wouldn’t talk in a normal case about who the parents are.”

Peterson indicated that he intends to play Sunday against Carolina. “Football is something I always fall back on,” he said. “It gets me through tough times. It’s being around the guys in here [the locker room] — that’s what I need. … I’m able to release a lot of my stress through sports.”

As for getting through difficult times, Peterson said he was “just stayin’ prayed up. One thing I always bounce back to is the good Lord never gives you more than you can bear, than you can handle. So I’m built tough.”

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