John E. O'Brien (October 22, 1851 – December 31, 1914) was a professional baseball player who played

outfielder An outfielder is a person playing in one of the three defensive positions in baseball or softball, farthest from the batter. These defenders are the left fielder, the center fielder, and the right fielder. As an outfielder, their duty is to catch ...

in the Major Leagues in 1884 for the Baltimore Monumentals of the

Union Association The Union Association was an American professional baseball league which competed with Major League Baseball, lasting for just the 1884 season. St. Louis won the pennant and joined the National League the following season. Seven of the twelv ...

. He later played for the Bridgeport Giants of the Eastern League in 1885.

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1851 births 1914 deaths Major League Baseball outfielders Baltimore Monumentals players 19th-century baseball players 19th-century American sportsmen Bridgeport Giants players Baseball players from Columbus, Ohio {{US-baseball-outfielder-1850s-stub