Where does Floyd "Money" Mayweather rank in the pantheon of ALL TIME GREAT boxers ?

Extremely overrated. He is the one of the biggest cherry pickers of all time. Mayweather Jr. strategically choose many of his fights.

He's top 20, probably in the teens, I don't even think he's better than Pacquiao pound for pound.

Extremely overrated an definitely not the greatest of all time. His career is already being forgotten.

Floyd chased money instead of glory. So much of his career was spent fighting up and comers early or legends near the end of their career. That being said I still think he's one of the greatest defensive fighters ever, and I still rank him very high. Top 10 in his division? Absolutely. Top 5? Possibly yeah. Top 10 P4P? Also possible in my opinion. Top 5 P4P? Probably a stretch. I'm honestly convinced most of the people ranking him number one just wish they had his net worth. He's not messing with Sugar Ray Robinson. 

Erm hard one. The only 3 top fighters he fought at their peak IMO were corrales, castillo and Hatton. So I'll knock him for that. However he did beat some really good fighters even if they were either underweight or a bit past it. The unbeaten thing I really don't rate as highly as a defeat isn't everything. Sugar Ray Robinson and Leonard beat better fighters than Floyd.

P4p I don't think he'd make my top 10 ever, but a contender for the top 20