UFC Hall of Famer Mark Coleman -- the first UFC heavyweight champ ever -- is recovering in the hospital after suffering a heart attack.
The 55-year-old legend says he felt something was wrong late Tuesday -- "chest locked up my arms went numb" -- but he tried to sleep it off.
When things didn't get better after several hours, Mark hightailed it to the hospital where doctors found a "complete blockage of a major artery."
"If I [didn't go to the hospital] I’m probably not here today," Coleman posted from his hospital bed.
"I’m so glad I went I have so many things I want to do.