Just watching Friday’s show and the sax player was playing a whistle that looked very much like my Dixon, with the dull brass finish and long black head.
Right! 
I had a giggle the first time I heard the whistle on the Late Show a few weeks back. There wasn’t much to see then, no close up of the band. I didn’t think to post but wondered if anyone else would have noticed. Then on Friday they actually panned across to the band while the music was playing. Cool!
Anyway, that’d be Eddie Barbash. He’s played with a number of A-list performers in recent years. These days he’s with John Batiste and Stay Human. And I think you are right about the whistle he played on Friday. It’s a bit easier to see in this video.
Feadoggie
Hey thanks for finding that. It sure looks and sounds like my Dixon.