Who has the bed record in boxing?

The boxer with the worst record in professional boxing can vary depending on the criteria used (e.g., total losses, winless records). However, one notable name is Rocco "Rocky" Marciano, who is often cited for having a poor record due to his many losses; however, he is also a Hall of Famer with an undefeated record. For a specific example of a poor record, fighters like "The Fighting Accountant" Brian Custer, who had a record of 0-18, are often mentioned. Ultimately, the definition of "worst" can differ based on context.