ACCORDING TO THE NATIONAL ENQUIRER:

AFTER nearly five years be­hind bars, O.J. SIMPSON’s bizarre be­havior has some of his close friends worried that the former football great has gone gay.

“I don’t know what’s happened to O.J.,” an insider told The ENQUIRER. “He used to be Mr. Macho – a die­hard ladies’ man. He preferred the really fine sexy blondes, but being surrounded by only men has changed him.

“Now O.J. has way too much interest in guys, and he likes to show off his body to the hardened felons when they exercise in the prison yard. He’s doesn’t even talk about women, just about guys.

“It doesn’t sound to me like he’s straight anymore!”

Once a notorious skirt-chas­er, Simpson was convicted in 2008 for robbing memora­bilia dealers at gunpoint the year before. Not long after the conviction, the 65-year-old gridiron great was sent to Lovelock Correctional Center in Nevada to serve a 9- to 33-year prison sen­tence. He isn’t eligible for parole until 2017.

After the recent Super Bowl, the insider says O.J. called him – but he seemed more interested in the way the players looked than what happened in the game!

“He couldn’t stop talking about  Baltimore Ravens receiver Anquan Boldin,” noted the source. He said, ‘Anquan is my man! What a great look­ing guy!’

“Clearly, he wasn’t admiring Boldin just for his football skills. He kept going on about him and some of the other players in a tone that sounded sexual to me.

“That alone wouldn’t make me worry, but O.J. also spends a large part of his time in prison lifting weights. Though his hair is graying, he’s built up his body to where he is really muscular.”

READ MORE: National Enquirer