#4 Randy Couture vs Steven Seagal
If you recollect carefully, the Mayweather-McGregor fight's seed was planted with what seemed like a whimsical, typical alpha male call out by the UFC superstar. But we all saw the Frankenstein's monster it became.
A few years ago, a faint heartbeat of something similar was heard but thankfully, it never drew breath. In 2012, American sportswriter Jay Glazer asked MMA legend Randy Couture about the possibility of a comeback, to which he chuckled that he would consider it only if it was against (once upon a time)action movie star Steven Seagal.
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In true movie screen mysterious martial arts sage fashion, Seagal said that he would face the UFC's first two-division champion as long as there were no witnesses. Did he say that so as to not reveal some hidden, age-old, pinky finger death punch? Or was it because he didn't want to get his backside handed to him on camera? Whatever the reason, Couture didn't let it get a rise out of him and laughed the whole thing off, saying that his initial remarks that sparked off the whole TRP bait were just horseplay.