Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(Photo by Al Bello/Getty Images)

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.

Manny Pacquiao v Juan Manuel Marquez

(L-R) Manny Pacquiao throws a right at Juan Manuel Marquez during their welterweight bout at the MGM Grand Garden Arena on December 8, 2012 in Las Vegas, Nevada.