Not really a duck. He's not a MW. At 160, that's too much over reach for Floyd against the most athletic MW in some time.
2010 Sergio Martinez was a monster. He would knock Mayweather out. He's just too strong. Mayweather could handle the speed but not the volume or angles he'd come at him with, but it's the raw power that would tell.
funny Floyd cherry picked a green canelo at 154(152 catch weight)but he avoided a 2010 Sergio who was a much bigger threat then canelo
sergio back in 2010 after he knocked williams out was a much much bigger threat then a green canelo who couldnt even dominate ricky hattons brother