- Bats Right, Throws Right
- Height 5' 10", Weight 168 lb.
- High School Slatington High School
- Debut September 2, 1937
- Final Game June 12, 1945
- Born October 28, 1907 in Slatington, PA USA
- Died January 15, 1988 in Princeton, NJ USA
George Hennessey came to the majors three separate times. With the St. Louis Browns managed by Jim Bottomley in 1937, he appeared in 5 games. With the Philadelphia Phillies managed by Hans Lobert in 1942, he also came up for 5 games, pitching more innings this time and posting an ERA of 2.65 for a team whose overall ERA was 4.12. With the Chicago Cubs under manager Charlie Grimm in 1945, he saw action in two games, one in April and one in June. The Cubs went to the 1945 World Series, but Hennessey did not appear.
His nickname was "Three Star", no doubt after the cognac called "Three Star Hennessy".
George had at least 13 seasons in the minors with at least 199 wins. With the 1937 Meridian Scrappers he was 20-9, while in 1940 with the Trenton Senators he went 18-4. He managed twice in the minors.