Samantha Kelly - Sample586MA0719

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Female Bodybuilder allegedly raped by reigning Mr. Olympia

TMZ Sports: Bodybuilding superstar Shawn Rhoden -- the 2018 Mr. Olympia winner -- has been charged with 1st degree rape in Utah after allegedly sexually assaulting a female bodybuilder in 2018.

Cops in Salt Lake City tell TMZ Sports ... 44-year-old Rhoden -- who goes by Flexatron -- has not been arrested, but a warrant has been issued.

According to court docs, Rhoden's accuser claims she visited Rhoden in his hotel room in Oct. 2018. The unidentified woman told cops she viewed Rhoden as a mentor.

But, during the visit, the woman claims Rhoden forced himself on her -- and despite repeated pleas to stop, he refused. She claims he eventually stopped and let her leave the room.

Officials say the woman went to police and they collected evidence from her body that tested positive for Rhoden's DNA.

Rhoden has been hit with multiple criminal charges including felony rape, object rape and forcible sexual assault.