Decidedly the underdog in Saturday’s bout at the MGM Grand in Las Vegas, Timothy Bradley is not short on confidence that he can usurp Pacquiao for the World Boxing Organization Welterweight Championship. "It's all or nothing," he told the Associated Press at a press event this week. "No rounds off. Round by round I have to win each one." The 28-year-old, who hails from Palm Springs, California, currently holds the WBO Light Welterweight title.