WELL.. if I were personally going with who would be/could be the fastest in the 40 history, I'm sorry bra`, but I'd have to go with my boy Maurice Greene.. that man just couldn't be beat.. with all due to Bob Hayes, I dunno, I mean Mo would have his shoes put out with a fire extinguisher when he felt like it, and why ?? cuz he burned mf'ers!.. just sayin'.. "in the history of track and field", NOBODY murdered the 1st 40 like Mo Greene............ NOBODY!.. check some U-tube and let me know if I'm wrong.. much respect.