[3] He was originally signed by the New York Yankees in February 1926 after playing baseball at Tempe High School in Arizona, where he started as a catcher and outfielder before becoming a pitcher.

[5] It is unclear when Garrison moved on from the Yankees' organization; in January 1928, he was reported to be "another recruit" of the Boston Red Sox for the upcoming season.

[8] He made his major league debut on April 16, pitching two innings of relief against the Yankees in a home game at Fenway Park.

[9] Three of the batters that Garrison faced were future Baseball Hall of Fame inductees: Leo Durocher (who singled), Babe Ruth (who doubled), and Lou Gehrig (who hit a sacrifice fly).

[11] Whether Garrison played for Portland is unclear; by the end of the 1928 season he was pitching for the Pittsfield Hillies of the Eastern League.