William E. "Jocko" Halligan (December 8, 1868 – February 13, 1945) was an American professional baseball player who played outfielder in the Major Leagues from 1890 to 1892. He would play for the Baltimore Orioles, Cincinnati Reds, and Buffalo Bisons.

Jocko Halligan
Outfielder
Born: December 8, 1868
Avon, New York, U.S.
Died: February 13, 1945(1945-02-13) (aged 76)
Buffalo, New York, U.S.
Batted: Left
Threw: Unknown
MLB debut
May 13, 1890, for the Buffalo Bisons
Last MLB appearance
August 3, 1892, for the Baltimore Orioles
MLB statistics
Batting average.281
At bats737
Home Runs10
Teams
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