I don't think that any of the fighters named until now are in the genuinely "FAT" class, except Butterbean. He's very fast for his monstrous size.
But the REAL fastest genuinely fat fighter HAS to be BUSTER MATHIS, who beat Joe Frazier in the amateurs, mainly through speed, and did very well as a pro.
There was another guy, who ALWAYS beat Jack Dempsey,-I think 3-4 times- in 4 rounders, who was supposed to be very fast, I can recall seeing a picture of him long ago and he looked fat. He was called FAT WILLIE MEEHAN.
So there is a very eclectic choice for the Topic Starter right there. I think the answer would be BUSTER MATHIS. He was noted for his speed.
That guy is pretty big. I gotta watch some of his fights!!
Solis
Corrie Sanders
Kirk Johnson
Corrie Sanders was such a raw natural talent. Why he chose golf over boxing will always baffle me... He threw such straight powerful stiff punches. A great wasted talent.