Former DDB/Chicago group creative director John Immesoete has signed with Backyard Productions for representation as a commercials director. While at DDB, Immesoete and agency executive producer Greg Popp co-directed a number of commercials for Budweiser, including a campaign starring a football-playing prima donna named Leon. Immesoete is also currently working on a pilot for NBC that is loosely based on the character. ... Michael Prieve, formerly executive creative director at FCB/San Francisco, has been named ECD at Y&R/Irvine. ... Editor Jane Keller, formerly of The Now Corporation, has joined New York's Sideshow Creative.