John Henry Doscher, Jr. (July 27, 1880 – May 27, 1971) was an American left-handed pitcher in Major League Baseball from 1903 to 1908.

Born in Troy, New York, he played for the Cincinnati Reds, Brooklyn Superbas, and Chicago Cubs.

His father Herm Doscher had also been a major league player, as well as an umpire.

[1] Jack Doscher died in Park Ridge, New Jersey at age 90.

This biographical article relating to an American baseball pitcher born in the 1880s is a stub.