John Henry Knott (March 2, 1907 – October 13, 1981) was an American professional baseball pitcher with the St. Louis Browns (1933–1938), Chicago White Sox (1938–1940) and Philadelphia Athletics (1941–1942, 1946) of Major League Baseball.

He led the American League in saves (7) in 1935 and earned runs allowed (156) in 1936, and home runs allowed (25) in 1937.

Knott served in the military during World War II, and he was wounded on January 10, 1945, during the Battle of the Bulge.

[1] He was an alumnus of Southern Methodist University and died in Brownwood, Texas, at the age of 74.

This biographical article relating to an American baseball pitcher born in the 1900s is a stub.