Bush was one of the best defensive shortstops of the dead-ball era. He collected more putouts, assists, and total chances than any other shortstop of the era, and his 1914 total of 425 putouts is still the Major League record for shortstops. His 1914 total of 969 chances is also still the American League record. He also led the American League in assists by a shortstop on five occasions: 1909 (567), 1911 (556), 1912 (547), 1914 (544), and 1915 (504). Bush also holds the Major League record (shared with Bid McPhee) for most career triple plays with nine. Bush's triple plays came on May 4, 1910, April 24, 1911, May 20, 1911, September 9, 1911, April 6, 1912, August 23, 1917, August 14, 1919, May 18, 1921, and September 14, 1921.