OHL

Leagues for ice hockey in Ontario were first organized in 1890 by the newly created Ontario Hockey Association (OHA). In 1892 the OHA recognized junior hockey - referring to skill rather than age. In 1896 the OHA moved to the modern age-limited junior hockey concept, distinct from senior and intermediate divisions. Since then the evolution to the Ontario Hockey League has developed through four distinct eras of junior-aged non-professional hockey in Ontario. In 1933, the junior division was divided into two levels, Junior A and Junior B. In 1970 the Junior A level was divided into two levels, Tier I (or Major Junior A) and Tier II (or Minor Junior A). In 1974 the Tier I/Major Junior A group separated from the OHA and became the independent Ontario Major Junior Hockey League (OMJHL). In 1980, the OMJHL became the Ontario Hockey League.

The OHL split from the OHA in July 1982. The OHA and OHL disagreed on financial terms of affiliation, then the OHL decided to handle its own administration. The OHA and the OHL later reached an interim affiliation agreement, which allowed the OHL to compete at the Memorial Cup.

In March 2005, the league announced the launch of OHL Live Stream, resulting in OHL games being broadcast live on a pay-per-view (PPV) broadband basis.

OMJHL and OHL Commissioners (years in office)

• Tubby Schmalz (September 23, 1974 – December 15, 1978)
• Bill Beagan (December 15, 1978 – January 1979)
• Sherwood Bassin (interim; January–September 1979)
• David Branch (September 17, 1979 – August 6, 2024)
• Bryan Crawford (August 6, 2024-present)