He remained active organizing sports in Hamilton, including golf and curling, was a committee member for the 1930 British Empire Games, and was the Canadian Football Hall of Fame's inaugural curator.

[2] In early life, Miller played multiple sports at the YMCA, including basketball, football, hockey, and soccer.

[10] Planning to join the Buffalo Bisons of the International League for spring training, Miller hoped to turn professional in the 1921 season.

[11] Reporting to Portsmouth's player-manager was Jim Viox,[12] Miller wrote that he was welcomed with open arms, and won his first game, giving up only five infield hits and striking out ten batters.

[14] Portsmouth turned Miller back to Buffalo late in August,[15] and he returned to Hamilton due to an injury while pitching.

[33] He regularly covered the Hamilton Tiger-Cats and Canadian football,[34] including columns and articles for the amateur, semi-professional, and professional eras of the game.

[6] His other frequent subjects were baseball, curling, golf, ice hockey, rowing, and track and field; and events including the Grey Cup, the World Series, and the Indianapolis 500.

[b] Licences for private commercial radio stations in Canada were first granted in 1922,[37] when Hamilton's CKOC began broadcasting.

[38] From the rolling hills of Ancaster in 1923, Miller broadcast on CKOC the first play-by-play report on a golf tournament in Canada, by using a system of flag semaphore from boy scouts at each hole.

[41] During Miller's lifetime, the annual dinner at the Royal York Hotel raised approximately $500,000 for charity.

[34] Sportswriter Elmer Ferguson wrote that, Miller "never lost a sense of complete impartiality and sportsmanlike fairness".

[34] Miller's final project was an unfinished book on the history of sports in Hamilton, planned for release during the 1967 Canadian Centennial.

The hall of fame was temporarily located in a large house near Scott Park, but soon had to be vacated for a high school to be built.

[51][53] The hall of fame sought financial donations to build a permanent location, instead of receiving funding through municipal taxes.

[44] He was an honorary life member of both Army, Navy and Air Force Veterans in Canada (ANAVIC), and the Leander Boat Club of Hamilton.

He was one of only two Canadians at the time to hold a Professional Golfers' Association of America gold badge, gaining him entrance to any golf tournament.

[56] Since 1968, the CANUSA Games presents annually the Ivan Miller Award to a volunteer for service and exemplifying the philosophy and ideals of the event.