Jeffrey Roger Hartsock (born November 19, 1966) is a former Major League Baseball right-handed pitcher who played for the Chicago Cubs in 1992.

A native of Fairfield, Ohio, Hartsock is an alumnus of North Carolina State University, where he played college baseball for the Wolfpack from 1986 to 1988.

Prior to making his Major League debut, Hartsock would be traded to the Chicago Cubs for Steve Wilson on September 6, 1991.

He would eventually make his Major League Baseball debut with the Chicago Cubs on September 12, 1992.

This biographical article relating to an American baseball pitcher born in the 1960s is a stub.