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Browns quarterback Johnny Manziel entered treatment on Wednesday, adviser Brad Beckworth told ESPN.com through a Manziel spokesman.
"Johnny knows there are areas in which he needs to improve in order to be a better family member, friend and teammate and he thought the offseason was the right time to take this step," Beckworth said.
"On behalf of Johnny and his family, we're asking for privacy until he rejoins the team in Cleveland."