Hall of Fame running back Thurman Thomas opened up for the first time Friday about the effects of concussions he suffered during his 13-year NFL career.

The former Buffalo Bills star, who turns 50 next month, said at a concussion summit in Canada that he suffers from mood swings and his conditioned has worsened.

Percy Harvin has informed the Buffalo Bills he'll retire from the NFL.

Frustrated with a chronic hip injury, Harvin began entertaining thoughts of retirement when the Bills placed him on injured reserve last November.

By the middle of last month, Bills general manager Doug Whaley was operating under the assumption that Harvin was leaning toward playing again in 2016.

Harvin has always been one of the NFL's most unpredictable players.

LeSean McCoy is not expected to receive any discipline from the NFL for his alleged role in a nightclub altercation this offseason.

The Philadelphia district attorney opted not to press charges against McCoy due to a lack of evidence.

McCoy will likely be in the lineup for Week 1, with Karlos Williams backing him up. McCoy battled through injuries during his first season with the Buffalo Bills, running for 895 yards and three touchdowns on 203 carries across 12 games.

McCoy will turn 28 in July.