Hopkins, who turns 47 on Jan. 15, became the oldest boxer in history to win a major world title in May with a unanimous-decision victory over WBC and Ring magazine light heavyweight champion Jean Pascal. He defends it Saturday against Chad Dawson at Staples Center in Los Angeles (9 p.m. ET, HBO PPV). Currently the No. 6-ranked boxer in SI.com's pound-for-pound ratings, Hopkins was 192 days older than George Foreman, who was 45 years and 10 months when he knocked out Michael Moorer for the heavyweight title in 1994. Here's a look at 40 athletes who excelled past their 40th birthdays.