Frank Tigner Welch (August 10, 1897 – July 25, 1957) was an outfielder in Major League Baseball who played from 1919 through 1927 for the Philadelphia Athletics (1919–1926) and Boston Red Sox (1927).

In a nine-season career, Welch was a .274 hitter (634-for-2310) with 41 home runs and 295 RBI in 738 games, including 310 runs, 100 doubles, 31 triples, 18 stolen bases, and a .350 on-base percentage.

On October 1, 1921, Welch became the last person to hit a home run off Babe Ruth in a major league game; the homer was the 10th and last the Babe would ever allow as a pitcher.

Welch died at the age of 59 in his hometown of Birmingham, Alabama.

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