Colin Kaepernick has another powerful ally ... Dave Chappelle.
In fact, the comedian wore a shirt supporting the embattled QB on the way into his big stand up show Thursday night at Radio City Music Hall in NYC.
The shirts were being given out by the NAACP at the Kaepernick rally in front of NFL headquarters on Wednesday ... unclear if Chappelle was there or got a shirt after the fact.
Chappelle wore a different shirt on stage for the performance -- but made sure people saw it on the way inside.
As for Kaep, he finally spoke out about the rally on Twitter yesterday -- "Thank you to everyone who went out to support yesterday.