'Chief' co-author savored creative freedom in crafting play 'Harry's Friendly Service'

Pittsburgh Tribune-Review: "Theatergoers know Zellers best as the co-author of 'The Chief,' which he wrote with Gene Collier. A one-man play about Pittsburgh Steelers founder Art Rooney Sr., 'The Chief' debuted at Pittsburgh Public Theater in 2003 and has returned for short runs in each of the succeeding seasons."