Floyd Mayweather -- I’m The Greatest … Ranks Himself Above Ali (VIDEO)

Floyd Mayweather is known as “Money” ... but he's also "The Greatest" ... if you buy what he's saying about Muhammad Ali.

Floyd joined "SportsNation" on ESPN Deportes to rank his top 5 boxers of all time.

The undefeated champ put himself at the top of the list … however, the surprise came at the bottom ... where Floyd put Ali (at #5) ... whom most experts consider to be the greatest boxer ever.

Thanks to our friends at BSO for pointing out the ego trip.

No más Floyd, no más.