The raw data behind: "Mayweather Is Defined By The Zero Next To His Name" https://fivethirtyeight.com/features/mayweather-is-defined-by-the-zero-next-to-his-name/
undefeated
A data frame with 2125 rows representing boxing matches and 4 variables:
Name of boxer
URL with the boxer's record
Date of the match
Number of cumulative wins for the boxer including the match at the specified date
Box Rec https://boxrec.com/