William Thomas "Bill" Brennan (October 25, 1880 – September 13, 1933) was a Major League Baseball

Major League Baseball

Major League Baseball is the highest level of professional baseball in the United States and Canada, consisting of teams that play in the National League and the American League...

 umpire

Umpire (baseball)

In baseball, the umpire is the person charged with officiating the game, including beginning and ending the game, enforcing the rules of the game and the grounds, making judgment calls on plays, and handling the disciplinary actions. The term is often shortened to the colloquial form ump...

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Brennan umpired in National League

National League

The National League of Professional Baseball Clubs, known simply as the National League , is the older of two leagues constituting Major League Baseball, and the world's oldest extant professional team sports league. Founded on February 2, 1876, to replace the National Association of Professional...

 from 1909 through 1913. He then jumped to the upstart Federal League

Federal League

The Federal League of Base Ball Clubs, known simply as the Federal League, was an American professional baseball league that operated as a "third major league", in competition with the established National and American Leagues, from to...

, and umpired there in 1914 and 1915. Following several years of umpiring in the Minor Leagues

Minor league baseball

Minor league baseball is a hierarchy of professional baseball leagues in the Americas that compete at levels below Major League Baseball and provide opportunities for player development. All of the minor leagues are operated as independent businesses...

, with the American Association

American Association (20th century)

The American Association was a minor league baseball league at the Triple-A level of baseball in the United States from to and to . Together with the International League, it contested the Junior World Series which determined the championship team in minor league baseball, at least for the...

 and the Southern Association

Southern Association

The Southern Association was a higher-level minor league in American organized baseball from 1901 through 1961. For most of its existence, the Southern Association was two steps below the Major Leagues; it was graded Class A , Class A1 and Class AA...

, he returned to the National League in 1921. That was his final Major League year, and he would retire with 1093 Major Leagues games umpired, in addition to umpiring in the 1911 World Series

1911 World Series

-Game 1:Saturday, October 14, 1911 at Polo Grounds in Manhattan, New York-Game 2:Monday, October 16, 1911 at Shibe Park in Philadelphia, Pennsylvania-Game 3:Tuesday, October 17, 1911 at Polo Grounds in Manhattan, New York-Game 4:...

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