X factor in Pac/Mayweather fight?

If this fight has a long drawn out contract negotiation and doesn't happen for let's say 12 months, does anyone else worry that Freddie Roach's declining health could become a factor?

I have tremendous respect for Roach and think he is the premier trainer in the world, but sooner or later his health catches up to him, what type of effect would that have on Pac?