A conversation I return to with almost anyone I talk sports with is this, who is the most dominant athlete of all time? As in lump all athletes together, which one has completely eclipsed all others?

I go with Serena Williams. I can't think of anyone who's dominated their respective sports like she has. 4 straight Grand Slam titals, twice. 23 Grand Slam singles titals. 4 Olympic Gold Medals. She even won a tournament when she was pregnant.

I understand arguments for Manning, Mayweather, and Lebron but there are guys you can argue were as good or better. The only athlete I can think of that may have dominated their respective sport more than Serena Williams is Michael Phelps.