After the war, Stewart was signed by the Chicago White Sox in December 1918,[2][3] but he suffered an arm injury falling down a flight of stairs while working as a census taker,[4] and was sent to the minor leagues in May 1919.[5] As he was, apparently, on a major league roster yet never appeared in a major league game, Stewart is an example of a "phantom ballplayer."
In 1929, he played summer baseball for Falmouth in the Cape Cod Baseball League. A steady pitcher, he was described as "making up for his lack of speed with plenty of control and lots of headwork."[6][7]
Ice hockey coach and referee
During baseball offseasons in the 1910s and 1920s, Stewart generally coached Boston-area college and high school hockey teams.[8] From 1925 to 1931 he was the head coach at the Massachusetts Institute of Technology.[9]
In 1928, Stewart became the NHL's first U.S.-born referee, and served in that capacity until 1941, excepting his two seasons as coach of the Chicago Black Hawks; 1937–38 (when the team won the Stanley Cup) and 1938–39.
During the 1948 World Series, Stewart made a controversial call in Game 1, which received significant press coverage. In a scoreless game in the bottom of the eighth inning. Boston Braves' pinch runnerPhil Masi was on second base with one out. Cleveland Indians' pitcher Bob Feller attempted to pick off Masi at second base, and shortstop Lou Boudreau appeared to tag Masi out; however, Stewart called Masi safe.[10] Masi subsequently scored the only run of the game, giving the Braves a win in the first game of the series. Stewart's ruling was hotly debated in the media and by fans, especially after Associated Press photographs of the play were published.[11][12] Despite losing the first game, Cleveland would go on to win the series in six games. Upon his death in 1990, Masi's will revealed that he really was out on the play.[13][14]
Stewart worked 714 consecutive games from the time he entered the NL until September 1938, when he was stricken with appendicitis. He resigned from the NL umpiring staff in January 1955 after not being promoted to league supervisor, a position he claimed had been promised him by commissioner Ford Frick when he had been NL president; new league president Warren Giles instead announced that the position would not be filled.
Stewart was inducted into the United States Hockey Hall of Fame in 1982.[15] His grandson Paul became an NHL player and referee and like his grandfather was elected to the United States Hockey Hall of Fame in 2018.