VIA TMZ: Pro bodybuilder Rich Piana was placed into a  medically induced coma this week after suffering a medical emergency at  his Florida home, law enforcement sources tell TMZ Sports.

46-year-old Piana has competed and won several bodybuilding  competitions over the years -- including Mr. California -- and has  become an Instagram sensation, racking up more than 1 million followers.

Law enforcement sources tell us ... emergency personnel responded to a  possible overdose call at Piana's home on Monday afternoon. When they  arrived, Piana was unresponsive and was transported to a nearby hospital  where he was placed into a medically induced coma. 

Unclear how he's doing now. We're working on the story.