This minor leaguer was finally given a shot in the NHL in 1942-43 when the Chicago Blackhawks needed someone to fill in on their depleted blue line. World War II was in full swing and many hockey players including NHLers were helping the Allies war efforts. This opened up NHL jobs for long time minor leaguers like Carbol.
Carbol's cup of coffee in the NHL was short and sweet. He played in just six games and picked up 1 assist before he, too, was summoned by the war. He proudly served as a sergeant with the US Army's Air Corps.
The physical defender returned to St. Louis after the war and worked for a packing company for many years.
Leo Carbol passed away at the age of 81 on November 13th, 1991.