While I also agree with Earl Anthony as the greatest, I think it's a toss-up between Parker and Aulby for second place, with Dave Davis, Johnny Petraglia, and the incredibly powerful Steve Cook and Jason Couch right behind them.
One of the bowlers that I absolutely loved to watch whenever he made the show, but, alas, despite his talent, most powerful release and silky smooth form, never managed to win a title, was Richard Wolfe. I don't think there was ever anyone so smooth and powerful all in one package, either as a lefty or righty.
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Regards,
BowlingWolf