But how do you consider the best in one sport better than someone that dominated many sports? Thorpe was great at track and football and played professionally in baseball and basketball as well. The first multi-sport star. Jim Brown dominated football and lacrosse. Dave Winfield was incredible in football, basketball and baseball albeit at the collegiate level. He's the only player ever drafted in four major sports leagues. Ali was the greatest boxer... but how does that equate him to the greatest athlete? Ali's bigger than life stature is how he become the first American global icon and stood up against racism, politics, war, etc. (Pele was probably the first global icon). But that doesn't make him the greatest athlete just the most well-known, respected, and debated icon. Furthermore, how is getting pounded consistently in the head considered a true athletic endeavor? It's quite stupid.