Growing up in eastern Ontario, Lloyd Mohns was always a good athlete, but it was hockey that he was most interested n playing as a kid in the late 1920s and 1930s. At 17 he played for the Petawawa Cadets before moving on to the Pembroke Lumber Kings for three years from 1939 to 1942.
In 1942-43 he split his season between the New York Rovers of the EAHL and the Petawawa Grenades while also suiting up for one game with the Vancouver Army of the old NNDHL.
Mohns appeared in his one and only NHL contest with the New York Rangers in 1943-44, with much of the league depleted of its stars at the time during World War Two. The balance of his year was spent in New York with the Rovers of the EAHL and the Brooklyn Crescents.
He continued to play competitive hockey for another four years with stops in Hershey, Philadelphia and Kirkland Lake. While playing for the Brantford Indians in 1947-48, Mohns was suspended for life by the OHA-Sr A for assaulting referee Frank Elliot over a disputed call in a game against Owen Sound in January, 1948. It marked the end of his competitive hockey career.