Chalmer Luman Harris (January 17, 1915 – November 11, 1996) was an American right-handed pitcher, coach, manager, and scout in Major League Baseball.

The 6 ft 1 in (1.85 m), 185 lb (84 kg) Harris compiled a 35–63 record with a 4.16 earned-run average in 151 American League games with the Philadelphia Athletics (1941–1944 and 1946) and Washington Senators (1947).

The remainder of Harris' Major League career would be spent working in tandem with Richards, initially as a coach with the Chicago White Sox (1951–1954), Baltimore Orioles (1955–1961) and Houston Colt .45s (1962–1964).

On August 30, Richards stepped down as the skipper of the Baltimore Orioles to become the general manager of the expansion Houston Colt .45s, and Harris took command as interim pilot on September 1.

In August 1966, Richards returned to the major leagues as the vice president for baseball operations (in effect, general manager) of the Atlanta Braves.