Bill Yeager, the director of Jazz Studies at SDSU, counts Dizzy Gillespie, Frank Sinatra and Sarah Vaughan among his past collaborators, while bass trombonists Roger Wright and Greg Sorcsek have worked with such luminaries as Ella Fitzgerald, Elvis Presley, Mel Torm?? and Gerry Mulligan.Page:12??? -CommentsBe relevant, respectful, honest, discreet and responsible.