[2] In September 1916, Groom was also involved in a confrontation with George Sisler, the Browns' normally mild-mannered first baseman.

After an inning in which Sisler missed a high throw to first base, Groom yelled, "Listen, you...college boy, you run harder for those...balls.

Pale-faced, Sisler stared momentarily at Groom, then strolled over and punched the pitcher in the mouth with his left fist.

Throughout the 1920s and 1930s he was involved with the St. Louis Trolley League as a mentor, and in 1938, he was asked by the George E. Hilgard American Legion Post 58 to form Belleville's first tournament team.

A marker in his honor, part of a series that grew out of the Society for American Baseball Research (SABR) Deadball Stars books, was presented on June 5, 2008, at the Belleville Hilgards' home ballpark, Whitey Herzog Field.