LaRon Landry has been suspended for four games for a violation of the NFL's performance enhancing drugs policy.

Landry is the Indianapolis Colts' starting safety.

The Colts signed Dewey McDonald from their practice squad in a related move.

Jonathan Dwyer has been formally charged with assaulting his wife in two arguments in July at their Phoenix apartment.

An indictment publicly released late Friday charges Dwyer with felony aggravated assault and eight misdemeanors.

Dwyer allegedly broke his wife's nose during a July 21 argument and engaged in a dispute the following day in which he punched his wife and threw a shoe at his 17-month-old son, who wasn't injured.

The NFL on Friday said it had no evidence the Ray Rice elevator tape was ever sent to its offices or received by them, or that a call was made by a woman, from league lines, confirming delivery of the tape.

A league official e-mailed reporters, including ESPN's Adam Schefter, in response to an Associated Press story Thursday night about a law enforcement official saying he mailed a tape of the Rice incident to Jeffrey Miller, the NFL's senior vice president of security.

"Our office has found absolutely no evidence to support the claim of the anonymous 'law enforcement source' that he sent a video to the NFL office or that he received a telephone call to his 'disposable cell phone' from an unidentified female using an NFL line," the league said.

Miller responded Thursday night in a statement, saying: "I unequivocally deny that I received at any time a copy of the video and I had not watched it until it was made public on September 8."

The NFL has repeatedly said no one with the league saw the violent images until TMZ Sports released the video earlier this month.

Ray Rice's appeal will likely be postponed until after Robert Mueller completes his investigation into the NFL's pursuit and handling of evidence in his domestic violence incident.

Per the collective bargaining agreement, a hearing date must be set within 10 days of the notice of Rice's appeal, which was filed Sept. 16. If both sides agree to delay a healing, though, the process can be moved back.  

Rice was initially suspended two games for a domestic violence incident involving his then-fiancee at an Atlantic City casino in February. The suspension became indefinite last week after TMZ posted a video that showed Rice striking Janay Rice.

Drew Brees voiced criticism of Roger Goodell's unilateral powers on disciplinary issues.

Brees said he hopes the NFL's latest controversies will finally lead to a new disciplinary system that is fair, transparent and includes the NFL Players Association and independent experts instead of the "unilateral" system that has been in place with "no checks and balances."

"Too many times, I'd say especially over the last few years, a punishment's been handed down and nobody has really seen the evidence except for those in the league office - supposedly," Brees said. "So decisions were made in kind of a, 'Hey, trust us.' But did the public see any of the facts? Did the accused see any of the facts? In most cases, no."

The NFL had no checks and balances in the suspensions of Sean Payton and Mickey Loomis.

"That's why you have multiple parties to make sure everyone comes together, cooler heads prevail. The decision isn't just based on emotion at the time, which I can say I believe has happened in the past in regards to commissioner discipline. It's been based upon emotion as opposed to maybe the facts," Brees said. "And (a new disciplinary policy would) prevent that from ever happening again."

Morris Claiborne skipped the Dallas Cowboys' Tuesday walk-through and left the training facility after he was informed that Orlando Scandrick would replace him in the starting lineup.

The Cowboys could fine Claiborne for the incident.

Claiborne's demotion came a few hours after Jerry Jones said on his weekly radio show that the third-year cornerback had not been worth the sixth pick of the 2012 draft, which Dallas moved up to acquire.

"Is he what we had hoped for at this point when we drafted him with the sixth overall pick, giving up the [second-round] pick to go up to the sixth pick to get him? No," Jones said on 105.3 The Fan. "But he's going to be a good player."

On Sunday, Claiborne allowed five receptions for 108 yards and a 51-yard touchdown pass. He also clinched the victory for the Cowboys with an interception.

Steve Bisciotti says no one from the Baltimore Ravens ever discussed potential discipline for Ray Rice with Roger Goodell or the NFL.

"I expected four or six games," said Biscotti.

Biscotti was stunned that Rice would be suspended for just two games.

An ESPN report last week indicated that the Ravens campaigned for leniency for Rice.

According to Chris Mortensen of ESPN, Adrian Peterson "is in denial" about his short- and long-term future with the Minnesota Vikings.

"Several league sources say Adrian Peterson has not come to grips with the fact that his 2014 has all but officially ended," Mortensen said Sunday morning. "His goal to break Emmitt Smith's all-time rushing record is now a fading dream. And his future is in doubt after being indicted for these child abuse charges related to inflicting injuries on his four-year old son."

A source told Mortensen that Peterson "really doesn't get it" and "he is in denial" when it comes to his future with the Vikings and the 2014 season.

Mortensen reported the Vikings "themselves do not foresee Peterson in their future."

Dion Jordan has been suspended without pay for the next four games for a new violation of the NFL's Policy and Program on Substances of Abuse.

Jordan's previous suspension was lifted due to the terms of the NFL's new drug policy.

NFL Media Insider Ian Rapoport reported that the pass rusher is in a treatment center while he deals with his four-game suspension, per a source informed of the player's situation.

Adrian Peterson says he requested to take a polygraph test on charges of injuring his son.

A polygraph, or lie detector, is not particularly reliable and is not admissible in court.

Peterson has already admitted to what he did to his son.

The question a jury will ultimately settle is whether that constitutes negligent or reckless injury to a child under Texas law, not whether Peterson is telling the truth about what happened.