Never, ever use this word

Want to drive me crazy?

Use winningist.

Every time I hear it I just want to slap someone.

I don't care if ESPN and all the other networks use it; I don't care if some dictionaries allow it; I don't care if newspapers and magazines use it. Winningist is not a word.

If winninger isn't a word, then neither is winningist.

So, what do you use to describe a person who has won the most games in a sport? Use most winning.  For example:

     John Smith is the most winning coach in NCAA Division I football.
OR
     John Smith has won most games in NCAA Division I football.