The NFL has warned teams that 11-on-11 training camp drills were responsible for last year's spike in preseason concussions.

The league has stopped short of banning full-squad drills, which coaches consider essential to preparing for the contact that occurs during regular-season games. But NFL data showed that preseason concussions in 2017 increased by 73 percent, from 26 in 2016 to 45.

Jeff Miller, the NFL's executive vice president of health and safety initiatives, said Friday that he hopes the data "will inform what clubs do" when camps open. Miller said the league hopes to replicate its success in addressing a similar issue after the 2014 season. In 2015, camp concussions dropped by 33 percent.

"We didn't have a level and specificity of data then," Miller said, "but we went through a process led by our football operations to inform teams and talk to them and say, 'Hey, we noticed this data.' We brought it to their attention, and there was an effort by many of them to address the question. And we saw a drop the following year.

"Raising the consciousness level of that issue was definitely worthwhile. I don't want to take full credit for that decrease, but I think it informed what clubs did."

As training camp approaches, Andrew Luck is still throwing a football without pain.

The Indianapolis Colts quarterback hasn't played in a game since the 2016 season.

"No, no, no, not at all," Luck said when asked about any pain.

"I've put a lot of work in. And it's paying off. My goal is not to get to training camp and plateau. It's to keep getting better and better."

Outgoing Carolina Panthers owner Jerry Richardson has been fined $2.75 million by the NFL after an investigation into sexual and racial misconduct in the workplace.

The independent investigation, conducted by former U.S. attorney Mary Jo White, substantiated the allegations against Richardson.

It also stated that the team failed to report the allegations or any resolution agreements to the league.

Richardson, 81, announced shortly after the NFL took charge of the investigation that he planned to sell the team that he and investors paid $206 million for in 1993.

He also stepped away from the day-to-day operations, naming Tina Becker the new COO.

The NFL has suspended Jameis Winston for the first three games of the season.

The league said its investigation found the Tampa Bay Buccaneers quarterback inappropriately touched a female Uber driver in March 2016 in Scottsdale, Arizona.

Winston's suspension is without pay and he won't appeal.

Tamba Hali, who has totaled 89.5 sacks in his career, had some high praise for Kansas City Chiefs quarterback Patrick Mahomes.

"You're going to get a complete player," Hali told NFL Network's Good Morning Football. "I mean, he's a smart player. He can throw the ball. Athletically, he's gifted. You don't have to coach it.

"In practice I'd watch him just look guys off. I mean, Eric Berry, you look him off and complete the ball. He did it to Marcus Peters a lot. So, people don't know what's coming. I don't want to hype him, but I compare him to Brett Favre. He runs around the field and he throws the ball and he's just having fun."

Mahomes often drew comparisons to Favre leading up to the 2017 NFL Draft.

Nick Foles remains with the Philadelphia Eagles on a restructured contract, but his long-term future with the team is in question.

"I would love the opportunity to lead a team," Foles told Fox Sport's First Things First morning show. "Now, let me also say this, I'm not just going to go to a team and say, 'Hey, I want to lead this team,' and not see where they are. It's about an environment. ... So if that does come to be, I want to find the right [place], be with the right team, a team like the Philadelphia Eagles organization. They do it the right way. It's an amazing locker room with amazing leaders and coaches. I've been blessed to be a part of it. That's why I'm not running away.

"They had me under contract this year. Everyone wanted to know where I was going to be. I'm grateful to be a part of it. They restructured my deal. They wanted me there. I wanted to be there this year. We'll see what happens after the season, but I'm excited about this 2018 Eagles season. I get to wear that jersey at least one more year, and I'm super excited about wearing it one more year."

Foles has only started seven games over the past two seasons, but led the Eagles to a Super Bowl victory in February.

The quarterback's restructured deal includes a mutual option for 2019.

William Jenkins, the older brother of New York Giants cornerback Janoris Jenkins, has been charged with aggravated manslaughter after a body was found at the player's house in New Jersey.

The body was identified as Roosevelt Rene, 25, a family friend who had been living at the house.

William Jenkins was arrested on drug charges in 2006 and again in 2011. He was paroled from prison in July 2016, according to New York state department of corrections records.

Janoris Jenkins was not at home when the body was discovered and has been in Florida since the completion of Giants minicamp two weeks ago.

The Minnesota Vikings have agreed to terms on a five-year, $72 million contract extension with Danielle Hunter.

The deal includes $40 million in guaranteed money, with a $15 million signing bonus. The annual average worth is more than $14 million, on par with fellow Vikings defensive end Everson Griffen.

"I had to get this out of the way," Hunter said, acknowledging relief to have signed before training camp. "I didn't want to be bothered by anything."

Washington brought back their top three running backs from last season, but Derrius Guice is expected to be the team's starter.

The rookie has impressed early in the offseason.

Jay Gruden has also said that he's impressed with what Guice can do as a receiver.

The Chicago Bears have been lining Tarik Cohen up all over the field in offseason practices.

Cohen hopes to be utilized like Tyreek Hill was in Kansas City under offensive coordinator Matt Nagy, who was hired to be the head man for the Bears heading into 2018.

"I feel like if I could kick the football, he'd also want me to kick the football, too," Cohen told Jim Rome this week. "It just goes to show how many places he has me at. I've been everywhere. I've been at every position. It's crazy."

The Bears drafted Cohen in the fourth-round last year and he became the first rookie since Gale Sayers in 1965 to score touchdowns via rushing, receiving, passing and punt return in a single season.