By Larry Fine and Steve Gibsburg

Cleveland Browns quarterback Johnny Manziel has entered a treatment facility to deal with personal problems, the National Football League team said on Monday.

Manziel, who struggled to live up to his status as a No. 1 draft pick this season, entered treatment on Wednesday, the 22-year-old quarterback's adviser, Brad Beckworth, said in a statement.

"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," Beckworth said.

"On behalf of Johnny and his family, we're asking for privacy until he rejoins the team in Cleveland."

Cleveland Browns general manager Ray Farmer said: "We respect Johnny's initiative in this decision and will fully support him throughout this process.

"Johnny's privacy will be respected by us during this very important period and we hope that others will do the same."

Manziel, 22, played most of the season as a back-up to Brian Hoyer, starting just two games. He completed 18 of 35 passes for 175 yards and had two interceptions and zero touchdowns.

He was placed on injured reserve after injuring his hamstring in Week 16 against the Carolina Panthers.