Pat McAfee went all WWE on famous Knicks fans' asses on Tuesday ... cutting a promo to hype up Pacers fans during Game 4 of the Eastern Conference Finals -- and given the outcome, it might've helped Indiana get the dub.
The former Indianapolis Colts punter was handed the mic at Gainbridge Fieldhouse to inject more energy into those in attendance during the pivotal matchup ... and with his time in the spotlight, he politely pointed out the big-time visitors -- including Spike Lee, Ben Stiller and Timothée Chalamet -- who were courtside with hopes the Knicks would tie up the series.