 In New York City, the Polo Grounds hosted football teams early on; its rectangular nature lent itself well to football, but was also—somewhat less well—used for baseball.The original Yankee Stadium was designed to accommodate football, as well as track and field (Yankee Stadium popularized the warning track, originally designed as a running track around baseball fields), in addition to its primary use for baseball.Wrigley Field, while originally built for baseball, also hosted the Chicago Bears, just as Comiskey Park hosted the Chicago Cardinals and Tiger Stadium hosted the Detroit Lions.