I have to go undecided until the details about the fight is made. I need weight, gloves, ring size, etc.
I'm still undecided but there are two recent events/findings that works on Pacquiao's favor. 1. PBF got hit by JMM (slower fighter) and could not knock him out. 2. PAC has a granite chin, he took some shots from a true welter weight (Cotto).
I think this will be a battle of stamina. I feel the rolling, ducking and blocking with the elbows Floyd will do will take out more out of himself than punching. I'm not saying that Floyd doesn't have stamina, but the amount of punches thrown by Pac will wear out Floyd and in the later rounds, Manny will finally have enough opening to put an end to the fight, 11 or 12 rounds, Pac KO. If Manny will work on Floyd's body throughout the fight, Floyd will be worn out earlier. Manny will use a lot of feints and relentless attacks to keep Floyd moving non-stop.
The last time Mayweather fought an agressive, fast southpaw with a punch was Zab Judah, a fighter with serious heart and stamina issues, and, while Judah's energy and heart lasted, he gave Mayweather all sorts of problems and made him look quite vulnerable on several occasions. Then, as usual, his heart and energy faded. Pacquiao is like a Zab Judah that doesn't tire nearly as much, with similar speed but a higher workrate and much better heart and chin. I see a lot of problems for Mayweather in this fight.