Oscar is a multiple world champ and although he has losses to Trinidad and Mosley his legacy is assured.
He has also been great for boxing these past ten years and it doesn't matter if you like him or not, he has fought the best out there probably when he didn't have to.
He was robbed against Trinidad and the second Mosley fight was really his.
I believe he has only lost two fights, Mosley 1 and Hopkins. Mayweather needs his scalp more DLH needs his. If Mayweather wins this week then he deserves all credit due to him because the odds are stacked against him in this fight. His legacy depends on this result, a loss means it's back to 147lb and two years of cleaning up Cotto, Margo and whoever else challenges him.