David Crosby, former lead guitarist and backup vocalist of The Byrds... ...leaves The Byrds to be a replacement guitarist for The Band. He makes quite the name for himself while in The Band, but eventually has to leave. The rock band Bush, who just lost two of its members, sees his work in The Band and decides to take him in as a replacement for their two members, and he works out perfectly. I guess you could say a Byrd in The Band is worth two in the Bush.