Emanuel Yarbrough, largest UFC fighter ever, passes away at 51

Emanuel Yarbrough, right, competed in sumo wrestling, the UFC and professional wrestling. - Getty ImagesEmanuel Yarbrough, who was on the wrong end of the most famous knockdowns in early UFC history, passed away on Monday at the age of 51.

Yarbrough, who fought once in the UFC, and three times overall, was the largest MMA fighter in its history. At one time, he was listed in the Guinness Book of World Records as the world's largest athlete.

At 6-foot-7, he was billed at 616 pounds for a fight against 195-pound Keith Hackney on the third UFC event, held on Sept. 9, 1994, at the Grady Cole Center, in Charlotte, N.C. Exactly what he really weighed was subject to conjecture, because in those…