Can you guess the category I'm thinking of?

Rules are fairly simple, I am thinking of a category of boxers for example "Three or more time champions" or "Champions who won 10 or more defenses" and you have to figure it out by asking if a boxer fits the category, IE "Does Joe Louis fit the category" or "Does Benny Leonard fit the category" and ideally I'll respond with a yes or no but knowing my luck there might be some answers with a gray area depending on the category

 

Ah sorry, guesses are in the form of individual boxers such as "Does Willie Pep fit the category"

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If it helps here's an NBA example that inspired this thread.