[4] Football Dinsmore was a halfback for the 1922 Toronto Argonauts[5] teams with Lionel Conacher, Canada's Athlete of the Half-century.

[9] The team went to New York for an exhibition game, struggled with the American rules, losing 55 to 7; Dinsmore had a 32-yard run.

He was one of the greatest secondary defence men ever produced in Canadian football, and his absence weakened the Argo wing line.

"[11] Hockey In December 1919, 16 years old, he joined the Toronto Aura Lee Juniors, playing left wing and centre.

[16] They won the J. Ross Robertson Cup, defeated McGill, Quebec Champions,[17] but lost to Fort William.

[21] In the playoff semifinal with the Pittsburgh Pirates, Maroons coach Eddie Gerard said the star of the game was Dinny Dinsmore,[22] In the NHL championship game in Ottawa, Montreal in the third up 1-0 over the Ottawa Senators (original), finally Coach Gerard sent out "Kid Disturbance," sometimes known as Dinny Dinsmore, to break up the avalanche.

But in the middle of the 1929–30 season, he asked the Maroons about getting his old job back because he said the stock market did not offer the same thrills as playing in the NHL.

[26] In 1942 he played in an old-timers benefit game for Victory Loans, Montreal Canadiens versus Maroons.

[27] He was a coach at Loyola College (Montreal) (now part of Concordia University),[28] winning the Dominion Intermediate Intercollegiate Championships[29] and one of the first ten named to their Hall of Fame in 1967.

[30] Between hockey seasons, Dinsmore became a manufacturers' agent and travelled to England to get novelty lines.

He had season tickets for the Montreal Alouettes CFL team, but didn't watch hockey.