Former WWE Wrestler Sir Mo Dead at 58

Sir Mo — a former WWE tag team champion — has died … TMZ has learned.

Gerald Horne — Sir Mo’s brother — tells us the former wrestling star died Sunday night at a Texas hospital.

Sir Mo — who’s real name is Bobby Horne — had been battling kidney issues for a long time, which lead to him being hospitalized for the past couple months.

We’re told Sir Mo’s condition recently declined after he was diagnosed with pneumonia and a blood infection while in the hospital.

Sir Mo began his pro wrestling career in 1991 … and two years later signed with WWE alongside his tag team partner, Nelson Frazier. The duo became known as “Men on a Mission” … winning a WWE tag team title in 1994.

He was 58.