Buffalo Bills' owner Ralph Wilson will stay in-house to fill its top front-office vacancy, ESPN.com has learned through multiple league and team sources, and Bills' executive vice president of business operations Russ Brandon has emerged as the frontrunner. The opening was created when Marv Levy stepped down as general manager two weeks ago. A Hall of Fame coach who led the Bills to four straight Super Bowl appearances, Levy had come out of retirement two years ago to serve as the Bills' general manager. The team likely will announce Levy's successor next week. Brandon has worked for the Bills for 11 years and in 2006 was appointed to his current position in which he joined Levy in overseeing the club's front-office operations.