There may have been other players in the early to mid 80s, but I do know that I saw Don Downs with Woody during my senior year of high school, which was 84-85. He was also on the PBS special with Woody, Clark Terry, and Pete Barbutti a few months later. Spring or summer '85, I think. I saw a video on youtube of Byron Stripling with the band in '84, so maybe he preceded Don?