This is a cross-sport reference but Peyton Manning wore 18 and when he went to the Broncos he had to ask Frank Tripucka for permission. As a result the retired number sign has an awkward looking Manning reference on it.

It’s visible here https://www.denverbroncos.com/news/broncos-unveil-retired-numbers-tribute-in-pregame-ceremony-17712043

That’s a top 75 player all time