John G. Avildsen's films have inspired millions of underdogs and shaped popular culture for decades, yet most people don't even know his name. Sylvester Stallone, Ralph Macchio, Martin Scorsese, Burt Reynolds, Jerry Weintraub and Talia Shire among many others weigh on the unknown legend behind "Rocky" and "The Karate Kid," who directed seven actors to Academy Award nominations and earned his own Oscar for Best Director.