How did his relationship with Billy Joel come about? There's a video on YouTube of Billy performing Captain Jack on some TV show in 1974 and the drummer is no doubt Rhys Clark. He's got a nice looking oyster colored diamond pearl drumset in the video.
Here it is: http://www.youtube.com/watch?v=cs-L77JpMnM
Granted, he's no Bonham, but he's still friggin great!