How many fights would have a different outcome had they been set for 15 rounds?

[jon09]

All Oscar vs Tito vs Quartey vs Whitaker vs Mayweather vs Mosley I and II.
Mayweather vs JCC.
Hopkins vs Taylor

Chavez vs Mayweather? You know Mayweather was stopped twice in both fights?

My apologies. I meant to say JLC vs Mayweather Jr. Also how about MAB vs Morales.