Harry Sage (March 16, 1864 – May 27, 1947), nicknamed "Doc", was a Major League Baseball catcher in 1890 for the Toledo Maumees of the American Association.

In his only major league season, Sage played in 81 out of 132 games for the Maumees.

[1] A good defensive catcher, his .948 fielding percentage was above the league average of .925.

Sage died in his hometown of Rock Island, Illinois, at the age of 83.

This biographical article relating to a United States baseball catcher born in the 1860s is a stub.