I saw Mickey Roker several times with Dizzy Gillespie, once on Dizzy's birthday at the Jazz Showcase in Chicago. Dizzy was to play three sets that night. He had Jon Faddis with him, and Rodney Jones, Ben Brown and Mickey Roker. The one set we purchased a ticket for, Dizzy hardly played. The audience grumbled audibly when Dizzy said that he was finished with the set, because he had to save his lip for the next set. So Dizzy said, "OK, we'll play one more then." All of the musicians got ready, and on Dizzy's cue, played one unison note and left the stage.
I saw Dizzy and Mickey Roker again in May, 1978, at the Jazz Showcase, this time with Rodney Jones and Ben Brown only. That was a great performance by all. Dizzy played great--it was the only time I saw Dizzy live when he was really at a great level.
Mickey played well every time I saw him live.