building's angling roof has been painted in the form of a large billboard since at least the 1940s. In recent years, it has borne a bright-red Budweiser sign, and beginning in 2009, an advertisement for Horseshoe Casino. Other buildings have carried signs sponsoring beers, such as Old Style (when it was a Cubs broadcasting sponsor) and Miller, and also WGN-TV, which has telecast Cubs games since April 1948. Legacy partners In January 2013, the Ricketts family launched "Legacy Partners", a marketing effort to sell new advertising in and around the renovated Wrigley Field. In conjunction with the new "W Partners", the Cubs entered into 10-year agreements with its largest advertisers. – Anheuser-Busch – Under Armour – ATI Physical Therapy, a national Sports Medicine and Rehabilitation organization – Wintrust Financial Corporation, a Chicago-based regional bank holding company – Sloan Valve – American Airlines – Nuveen Investments – Advocate Health Care, the largest health care provider in Illinois. – Toyota Motor Corporation A permanent position just below the Clark and Addison marquee and other signage in and around the park and Wrigley Field parking lots. – PepsiCo Win flag Beginning in the days of P.K. Wrigley and the 1937 bleacher/scoreboard reconstruction, a flag with either a "W" or an "L" has flown from atop the scoreboard masthead, indicating the day's result. In case of a doubleheader that is split, both flags are flown. Past Cubs media guides show that the original flags were blue with a white "W" and white with a blue "L", the latter coincidentally suggesting "surrender". In 1978, blue and white lights were mounted atop the scoreboard, to further denote wins and losses. The flags were replaced in the early 1980s, and the color schemes were reversed with the "win flag" being white with a blue W, and the "loss flag" the opposite. In 1982, the retired number of Ernie Banks was flying on a foul pole, as white with blue numbers, in 1987, the retired number of Billy Williams joined Banks, the two flags were positioned from the foul poles, Banks from left field, and Williams from right field. Later on, the team retired numbers for Ron Santo, Ryne Sandberg, Ferguson Jenkins and Greg Maddux, with Jenkins and Maddux both using the same number (31). Keeping with tradition, fans are known to bring win flags to home and away games, and displaying them after a Cubs win. Flags