With the help of CompuBox and the ESPN Stats & Info team, here are some important numbers comparing the inside-the-ring exploits of Floyd Mayweather and Manny Pacquiao ahead of their fight Saturday night.
Total connect percentage
Ranks are among all active fighters
Fights lost on judges' scorecards
The only fight Mayweather lost on a judge's scorecard was against Oscar De La Hoya (May 5, 2007), when Tom Kaczmarek scored it for De La Hoya 115-113.
Knockdowns
Mayweather's only official knockdown occurred against Carlos Hernandez (May 26, 2001), when his glove touched the canvas in the sixth round.
Knockout percentage
The percentage is based on victories. Mayweather's most recent knockout was against Victor Ortiz (Sept. 17, 2011), while Pacquiao most recently scored a KO of Miguel Cotto (Nov. 14, 2009).
Most punches thrown and landed in a fight
Both Pacquiao's maximums came in the same fight -- vs. Antonio Margarito (Nov. 13, 2010). Mayweather threw his most against Miguel Cotto (May 5, 2012) but landed the most against Juan Manuel Marquez (Sept. 19, 2009).
Opponents' total connect percentage
Ranks are among all active fighters
Plus/Minus (total punches)
Plus/Minus is determined by subtracting an opponent's connect percentage from the fighter's overall connect percentage. Ranks are among all active fighters.
Power punches
The first numbers indicate the average thrown per round; the second numbers show connect percentages and ranks among all active fighters.
Punches per round
The numbers show the average thrown and landed per round.
World title fights
Division of labor
The number of weight classes in which the fighters have held a world title. Pacquiao's number is an all-time record.