WATERTOWN — The childhood hero of the founder of the Watertown Area Boxing Club is making a return. Hall of Fame boxer Ray “Boom Boom” Mancini will appear twice in Watertown on the occasion of Saturday’s Battle Of The Badges 6 boxing matches at Jefferson Community College. Mancini, the 1982-84 WBA lightweight champion, will speak at 7 p.m. today at Immaculate Heart Central School, discussing his career and his faith. Then, on Saturday, he’ll appear at JCC as the WABC’s special guest.