Undefeated sensation “Ireland’s” John Duddy returns to action November 21 in his adopted New York City home, headlining “The Grande Event” against veteran Sam “The Punching Policeman” Hill, at famed Roseland Ballroom in Manhattan. Duddy, 25-0 (17), on his way from the middleweight to light middleweight division, is fighting at 158 pounds against Hill, 17-9-1…