1912-1912 (1 season)
Under manager Burt Keeley who pitched for the MLB Washington Senators, and owned by William C. Niesen, the Green Sox of Chicago played their games out of Gunther Park which was, and still is, located at Clark Street and Leland Avenue, which was just 11 blocks from Wrigley Field. Big name players for the Sox included Lou Gertenrich, Tom McGuire, Jim Stanley, and Ed McDonough, all of which played in the pros. Chicago held a 10-12 record at 6th place in the USBL standings.