he is preparing himself to walk through either Mosley's powerboxing or Mayweather's effective counterpunching.
I thought he was testing his chin all night because I have a feeling that this is the plan when he fights either of the 2 mentioned above.
Pac and Roach know that he will either be pressured by Mosley or countered by Mayweather the whole night. The important thing is that he keeps his workrate up, paces himself, and presses the fight, while walking through big punches and counters, the same ones that Clottey were connecting with on Saturday.
Clottey was a good test for this.
Big WW with a good strong jab and a solid puncher. The fact that he was hitting Pac flush with good, clean punches, while Pac was still able to sustain his attack bodes well for Manny, whoever he is fighting in the future.
Despite the marks on his face and the obvious discomfort from the few, but effective, punches that Clottey threw, Pac actually got stronger as the fight progressed. This is a good sign that Pac's in there to take the fight to either Mayweather or Mosley.
It should be one hell of a fight.