Patrick Joseph Mullin (November 1, 1917 – August 14, 1999) was an American Major League Baseball outfielder for the Detroit Tigers from 1940 to 1941 and 1946 to 1953.

Born in Trotter, near Connellsville in Fayette County, Pennsylvania, Mullin was signed by the Tigers before the 1937 season as a 19-year-old amateur free agent.

However, World War II intervened and Mullin joined the United States Army, missing four full seasons during the prime of his athletic life from ages 25–28.

After the 1948 season, Mullin played largely as a reserve outfielder and left-handed hitting pinch hitter.

In ten major league seasons, Mullin played in 834 games for the Tigers, 637 as an outfielder and the rest as a pinch hitter.