William Harlan Wilson (September 19, 1944 in Pomeroy, Ohio – August 11, 1993 in Broken Arrow, Oklahoma) was a professional baseball pitcher. He played all or part of five seasons in Major League Baseball for the Philadelphia Phillies from 1969 to 1973 as a relief pitcher. He appeared in 179 games, including one as a third baseman on August 6, 1971.