I don't know if this was already posted before, but my friend told me that the guy who comes out in 'All of Us' who plays the main character's best friend, is Chris Rock's brother in real life. They kinda look alike too. You can see his picture in this website:
I don't know why Chris' brother's name is Drew in the show, unless it was a different brother. If any one knows anything about this, please post it, Thank You.