CLEVELAND — Johnny Manziel has sought help to change his off-field lifestyle.

Following a rough rookie season in the NFL, Manziel has entered a treatment program for unspecified reasons, an adviser for the Browns quarterback said in a statement released Monday by the team.

“Johnny knows there are areas he needs to improve on to help him be a better family member, friend and teammate, so he decided to take this step in his life during the offseason,” Manziel adviser Brad Beckworth said. Beckworth said the former Heisman Trophy winner entered the unidentified facility last week.

Beckworth’s statement did not indicate reasons for Manziel needing treatment. The 22-year-old’s penchant for partying followed him from college into the pros, and Manziel’s nightlife has been well-chronicled by both social and mainstream media.

Browns General Manager Ray Farmer said in a statement that the team fully supports Manziel and respects his initiative in entering treatment.

“Our players’ health and well-being will always be of the utmost importance to the Cleveland Browns,” Farmer said. “We continually strive to create a supportive environment and provide the appropriate resources, with our foremost focus being on the individual and not just the football player.”

Citing privacy laws, a Browns spokesman declined to provide more information.

Off the field

Sapp arrested, fired by NFL Network: In Phoenix, former NFL lineman and Hall of Famer Warren Sapp was arrested on suspicion of soliciting a prostitute and allegedly assaulting two women, Phoenix police said.

Hours later, the NFL Network announced it had terminated its contract with Sapp, who worked as an analyst for the network since 2008 and was in Arizona for Sunday’s Super Bowl.

Sapp, 42, was taken into custody at a downtown Phoenix hotel and booked into jail, police said. He made his initial appearance late Monday afternoon before a Phoenix Municipal Court judge and was released pending a Feb. 23 court date.

Authorities said Sapp faces a maximum penalty of $2,500 in fines, six months in jail, three years’ probation and mandatory 15 days in jail if convicted on the prostitution charge.

A tackle and defensive end, Sapp was inducted into the Pro Football Hall of Fame in 2013.

Around the league

Ravens defensive tackle Terrence Cody was indicted on animal cruelty charges, some of which stem from the death of his dog and possession of an alligator. His agent called the charges ludicrous and said Cody is an animal lover. ... Seahawks cornerback Richard Sherman played the Super Bowl with torn ligaments in his left elbow and likely will need Tommy John surgery.