NFL

Former NFL quarterback Johnny Manziel reveals he has bipolar disorder

Former NFL quarterback Johnny Manziel revealed that he was diagnosed with bipolar disorder a year ago and has since quit drinking.

Heisman Trophy winner hasn't played football since being released by Browns in 2016

Quarterback Johnny Manziel revealed he takes medication to treat bipolar disorder. He was released in 2016 by the Cleveland Browns, who drafted him in the first round in 2014. (Peter G. Aiken/Getty Images)

Johnny Manziel was selfish, entitled and dealing with bipolar disorder.

Manziel, who became the first freshman to win the Heisman Trophy in 2012 before his rapid flameout in the NFL, said Monday in an exclusive interview with ABC that he was diagnosed with bipolar disorder a year ago and since quit drinking.

"I'm working to try and make sure that I don't fall back into any type of depression, because I know where that leads me and I know how slippery a slope that is for me," Manziel told ABC News' "Good Morning America." "At the end of the day, I can't help that my wires are a little bit differently crossed than yours. I can't help my mental makeup of the way that I was created."

Manziel, 25, said he takes medication to treat his bipolar disorder. Manziel has not played football since 2015 and was released in 2016 by the Cleveland Browns, who drafted him in the first round in 2014.