Adrian Peterson will be reinstated by the NFL effective on Friday.

In a letter from Roger Goodell, Peterson was informed that he is expected to fulfill his remaining obligations to the authorities in Minnesota and Texas, as well as the additional commitments Peterson made during his April 7 meeting with the commissioner regarding maintaining an ongoing program of counseling and treatment as recommended by medical advisors.

Jamaal Charles admitted he felt frustrated by injuries in 2014.

Charles’ troubles began at the conclusion of training camp in St. Joseph, Mo. He twisted an ankle when he stepped off a curb he didn’t see while carrying a box from the dormitory at Missouri Western State University.

“I feel good,’’ Charles said. “My body has healed up, rested up.

“I was frustrated more last season as I’ve ever been because of all of those injuries. I was frustrated because I didn’t feel my body was right the whole season. But I battled through that time. That’s all I could do. I felt like I was in a fight and I had to respond. I had 12 weeks to finish the season, and it felt to me like I had 12 rounds to go.’’

Charles missed just one game, but missed a lot of practice time.

Le'Veon Bell will be suspended for the first three games of the 2015 NFL season for violating the league's Policy and Program for Substances of Abuse.

Bell has been officially notified of his punishment and will appeal his suspension.

Bell was sentenced in February to 15 months probation in a first-offender's program stemming from the incident.

LeGarrette Blount has been suspended one game by the NFL for violating the NFL's policy for substances of abuse.

Blount and Le'Veon Bell were arrested last summer for marijuana possession.

Bell was driving the car and charged with DUI in the case, which was resolved with a sentence of probation, and faces a likely two-game suspension from the league.

The Dallas Cowboys have one of the NFL's best offensive lines and they're confident they can maximize the talent of Darren McFadden.

McFadden averaged less than 3.4 yards per carry for the Oakland Raiders over the past three seasons.

“We liked him a lot coming out of college,’’ Jason Garrett said. “He came out in ’08. That was the same year we drafted Felix Jones. We spent a lot of time with him and on him. I think he was the fourth player taken in that draft. There was a lot to like about him.

“We are confident in the environment we can create for our guys to bring the best out in him.’’

McFadden played in 16 games for the first time in his career last season. He missed 19 games over the previous three seasons and has played in more than 13 games in a season only once in his career.

“He is a big explosive back,’’ Garrett said. “He is quick. He is fast. He is physical. He can run inside. He can hit the home run.  He can catch the ball. He can protect.

“Now injuries have been an issue for him. We don’t think significant injuries, more the soft tissue type injuries. Hopefully we can create the right environment for him to be healthy and take advantage of those opportunities.’’

Sammy Watkins has undergone surgery in an area near his hip.

Watkins had the procedure done sometime before the Super Bowl for the injury that was suffered in a Week 13 win over the Cleveland Browns, according to sources.

It's unclear if the procedure will affect Watkins' availability for voluntary offseason workouts, which begin April 6.

Watkins led the Buffalo Bills in targets (128), yards (982) and receiving touchdowns (six).