Claude William Willoughby (November 14, 1898– August 14, 1973), was an American professional baseball pitcher who played in Major League Baseball for the Philadelphia Phillies and Pittsburgh Pirates from 1925 to 1931.

[4] Willoughby pitched in just nine games for Pittsburgh, after which his major league career ended.

[5] After his professional baseball career, Willoughby moved back to Kansas, where he pitched for a semipro team located in Chanute in 1938-39 and managed a team in Independence in 1940-41.

[6] He worked as a pump mechanic, and moved to McPherson, Kansas in 1948, where he died on August 14, 1973.

This biographical article relating to an American baseball pitcher born in the 1890s is a stub.