Rock is a pencil jockey by trade. He's done work for AC Comics, Main Enterprises, and Moonstone, among others. Some of the strips he's created include Dinosaur Girl (AC Comics, creator, writer, pencils), Crissy Carrots (Main, creator, writer, pencils), and Betsy the Bookwriter (Main, co-creator, writer, pencils). His specialty is cheesecake cartooning (what they call "good girl art" these days).
Three’s Company was one of the most popular US sitcoms of the mid-to-late 70s. Based on the British sitcom, Man About the House, it took some experimenting to create the winning formula that put the show at the top of the Nielsen’s.