Peter James O'Brien (June 16, 1867 – June 30, 1937) was a

Major League Baseball Major League Baseball (MLB) is a professional baseball organization and the oldest major professional sports league in the world. MLB is composed of 30 total teams, divided equally between the National League (NL) and the American League (AL), ...

player. He played in one game for the

Washington Nationals The Washington Nationals are an American professional baseball team based in Washington, D.C.. They compete in Major League Baseball (MLB) as a member of the National League (NL) East division. From 2005 to 2007, the team played in RFK Stadiu ...

in 1887 and 27 games for the

Chicago Colts The following is a North American professional sports league organization, franchise history of the Chicago Cubs of Major League Baseball, a charter member of the National League who started play in the National Association of Base Ball Players, ...

in 1890.

Sources

Retrosheet page for Pete O'Brien
1867 births 1937 deaths 19th-century baseball players Baseball players from Illinois Chicago Colts players Major League Baseball second basemen St. Paul Apostles players Washington Nationals (1886–1889) players Chicago Whitings players {{baseball-second-baseman-stub