#3 Skip Hall
In 2006, Dan Severn must have done a double take when he looked at his opponent, Skip Hall, up and down. Severn, 48 years old himself, couldn't have imagined in his wildest dreams that he would be fighting someone 10 years older. The fight ended with Hall being choked out by The Beast, but he did step into the cage one last time after that.
A former US army veteran, Hall started training in BJJ just shy of his 50th birthday and notched up impressive personal bests in weightlifting after that age - his PB squat is an astounding 600 lbs!
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The bout against Dan Severn would be his penultimate, with his last fight ending unfortunately in a no contest due to an eye poke. Hall retired in 2008 aged 63, with the distinction of being the oldest MMA debutant (57 years)