A few numbers to keep in mind as we zero in on Mayweather-Pacquiao.
1: Number of judges -- in 21 Mayweather fights that have gone the distance -- whose scorecards have been in favor of an opponent (Tom Kaczmarek, in Mayweather's 2007 fight with Oscar De La Hoya).
1: Number of times -- in 47 career fights -- that Mayweather has been offocially knocked down. Another apparent knockdown, against Zab Judah in their 2006 fight, was not called.
2: Number of wins Mayweather needs to match Rocky Marciano's iconic 49-0 career record.
3: Number of times Pacquiao has been knocked out in a professional fight. Most recently, in six rounds by Juan Manuel Marquez at 147 pounds in 2012.
3: Number of welterweight belts at stake May 2. Floyd holds the WBA and WBC belts, while Pacquiao holds the WBO belt.
5: Number of weight classes in which Mayweather has won sanctioning body world title belts.
6:Number of times Pacquiao knocked down Chris Algieri -- his most recent fight
7: Number of weight classes in which Pacquiao has won sanctioning body world title belts.
12: Combined number of Mayweather (seven) or Pacquiao (five) fights previously worked by Saturday's referee, Kenny Bayless.
16: Number of world championship fights Pacquiao has won in his career. He also has three losses and two draws.
24: Number of world championship fights Mayweather has won in his career. He has never lost one, of course.
221: Number of punches landed by Marcos Maidana against Mayweather in May 2014, the most ever by a Mayweather opponent.
800: Number of punches boxing analyst Al Bernstein suggests Pacquiao will have to throw -- an average of nearly 67 per round for 12 rounds -- to have a shot to beat Mayweather.
Follow the Money
$5:Amount Freddie Roach charges newcomers per workout at his Wild Card gym.
60:Number of seconds it took tickets to sell out when they were made available to the public.
94 to 98 percent:Estimated fight-night hotel occupancy in Las Vegas.
$1,600:Minimum fight-night room rate for the MGM Grand Hotel. Same rooms are normally $200.
350,000:Number of buys for Pacquiao's first pay-per-view fight, in 2005, against Erik Morales
1.25 million:Number of buys for the two best-selling pay-per-views of Pacquiao's career, against Miguel Cotto in 2009 and against Juan Manuel Marquez in 2011.
2.48 million:Number of buys for the most-purchased pay-per-view fight in history – Mayweather vs De La Hoya in 2007.
13.2 million:Record amount of sponsorship money, from five key sponsors, this fight has attracted.
$74 million:Estimated revenue generated by ticket sales -- $14 million more than the Super Bowl.
$180 million:Take-home pay Mayweather is widely reported to be earning Saturday night.
$425 million:What Forbes is projecting Pacquiao's career earnings will reach after the Mayweather fight.
$500 million: Estimated overall revenue from tickets, pay-per-view sales, concessions and merchandise.
