Jazz pianist Ronnie Mathews has passed away at the age of 72 after a battle with pancreatic cancer. Matthews had been the subject of an all-star benefit and tribute just last week at Sweet Rhythm in New York City. If you've spent any time listening to 1960s, 70s and 80s hardbop, there's a good chance that you've heard Ronnie Matthews on the keyboards at some point--Dexter Gordon's live 1976 opus Homecoming, for example, or...