Personally I think because:

- he is changed by his new religion.
- he has all the money he wants.
- he do not want his 4th lost.
- he has taken serious advices from Vicky Bello, his derma.
- he is frustrated on the having a convincing win against the old Marquez.
- he has a changed of heart and gearing up towards serious politics.

[img]http://upload.wikimedia.org/wikipedia/commons/thumb/5/50/Ceremonial_first_pitch_by_Manny_Pacquiao%2C_April_21%2C_2009.jpg/175px-Ceremonial_first_pitch_by_Manny_Pacquiao%2C_April_21%2C_2009.jpg[/img]

Ikaw? What's your take on this?