Henry Knox "Heinie" Elder Sr. (August 23, 1890 – November 13, 1958) was a Major League Baseball pitcher.

After attending the University of Minnesota, and playing baseball for the "Golden Gophers" in his 1911 freshman season,[1] Heinie Elder played one game in the major leagues, at age 22, as a left-handed relief pitcher for the Detroit Tigers on July 7, 1913.

He held administrative posts as a major and lieutenant colonel during World War II.

[4] Elder graduated from the University of Minnesota Law School and became a lawyer.

He died in 1958 at age 68 at the Veterans Hospital in Long Beach, California.