You new school shooters, you're nothing, I'm from the old school like Mullin and Paxson
If you’re new in the game, you have to work your way up. Royce is from the “old school”, where his name has already been marked engraved.
The second part of the line is referring to Chris Mullin and John Paxson (both former NBA players during the 80’s and 90’s); Royce probably watched them play when he was growing up. They mainly played for the Warriors and Bulls, respectively.
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