Who Stands A Better Chance Of Beating Mayweather: Pacquiao or Martinez?

In my opinion Mayweather beats Pacquiao but Martinez? Im not so sure about because of not only size but movement. Both are lefties but May has enough of a reach advantage and his defense will neutralize Pac's power. Martinez is far from unhittable but he's a boxer more so than slugger and height-wise he's +3, reach + 4 and after fighting Cintron, Williams, and Pavlik in his last 3, Im not sure if Floyd will be able to land something to keep Serg off of him enough so we would be able to see the precise shots that we usually see from him.