Floyd Mayweather Shades Conor McGregor Over Forbes List: I Coulda Been #1 and #4!

Floyd Mayweather isn't ALL smiles over his top rank on Forbes' highest paid athletes list this year ... telling TMZ Sports he shoulda been technically No. 1 AND No. 4!! "Conor's at No. 4 because of me," Floyd said of the UFC superstar he boxed back…