Leon Stickle (born April 20, 1948 in Toronto, Ontario) is a retired National Hockey League linesman. His career started in 1969 and ended in 1997. During his career (in which he wore a helmet from the mid-1980s until his retirement), he officiated six Stanley Cup finals, 1,987 regular season games, and four All-Star games. He may be best known for missing an offsides call which lead to the NY Islanders first Stanley Cup in 1980 against the Philadelphia Flyers. He later admitted to missing the call..