American football player Adrian Peterson has been indicted in Texas on a charge of child abuse after using a branch to discipline his son.
Peterson's lawyer, Rusty Hardin, said that the charge in Montgomery County accuses the Minnesota Vikings running back of using a branch, or switch, to smack one of his sons, whose age was not disclosed.
Mr Hardin said Peterson has co-operated with authorities and did not mean any harm.
"Adrian is a loving father who used his judgment as a parent to discipline his son. He used the same kind of discipline with his child that he experienced as a child growing up in east Texas," Mr Hardin said.
"Adrian has never hidden from what happened. He has co-operated fully with authorities and voluntarily testified before the grand jury for several hours.
"Adrian will address the charges with the same respect and responsiveness he has brought to this inquiry from its beginning. It is important to remember that Adrian never intended to harm his son and deeply regrets the unintentional injury."
The Vikings, about an hour after issuing a statement acknowledging the case but deferring questions to Mr Hardin, said Peterson would be on the inactive list for their home opener against New England.
A warrant has been issued for Peterson's arrest, and he will have to turn himself in. There is no timeline for when he will appear in Texas, his lawyer said.
"We are just obligated to try to get it done as soon as possible, which we intend to honour," he said.
The allegations came during a week in which the NFL has been under heavy criticism and scrutiny for the way it handled a domestic violence case involving former Baltimore Ravens running back Ray Rice and his then-fiancee.
An independent investigation headed by former FBI director Robert Mueller has been convened to look into the handling of the Rice situation.
Commissioner Roger Goodell initially suspended Rice for just two games. After a longer version of security video surfaced on Monday showing Rice punching her in the face, the Ravens released Rice and the league suspended him indefinitely.
Critics are also closely watching how the league proceeds in the cases of Carolina Panthers defensive end Greg Hardy and Ray McDonald of the San Francisco 49ers, both still playing with domestic abuse cases pending.
Hardy was convicted July 15 of assaulting a woman and communicating threats, but is appealing. San Jose police are still actively investigating an August 31 incident involving McDonald.
The NFL did not immediately respond to a request for comment on Peterson's situation.
Peterson is in his eighth season, all of them with the Vikings. Widely considered the best running back in the league, he has rushed for 10,190 yards and 86 touchdowns in his career.
Peterson did not practice on Thursday because of what coach Mike Zimmer called a "veteran day", allowing experienced players to rest, but Peterson was at the team facility that day and spoke to reporters about the upcoming game against the Patriots.
He returned to practice yesterday and was in the locker room following the workout with the rest of his team-mates for lunch. Shortly thereafter, Peterson posted a message on his Twitter account that said in part: "It's your season! Weapons may form but won't prosper! God has you covered don't stress or worry!"
Last season, not long after finding out that he had a two-year-old son living in South Dakota, Peterson rushed to the hospital after authorities said the boy was brutally beaten by his mother's boyfriend. The boy died, and a 28-year-old man is scheduled to go on trial next month on second-degree murder charges in the case.
A law enforcement official says he sent a video of Ray Rice punching his then-fiancee to an NFL executive five months ago, while Commissioner Roger Goodell has insisted the league didn't see the violent images until this week.