Leon Stickle is a retired National Hockey League

National Hockey League

The National Hockey League is an unincorporated not-for-profit association which operates a major professional ice hockey league of 30 franchised member clubs, of which 7 are currently located in Canada and 23 in the United States...

 linesman

Official (ice hockey)

In ice hockey, an official is a person who has some responsibility in enforcing the rules and maintaining the order of the game. There are two categories of officials, on-ice officials, who are the referees and linesmen that enforce the rules during game play, and off-ice officials, who have an...

. His career started in 1969 and ended in 1997. During his career (in which he wore a helmet

Hockey helmet

A hockey helmet is worn by players of ice hockey and inline hockey to help protect the head from potential injury when hit by the puck, sticks, skates, boards, other players, or the ice.-Construction:...

 from the mid-1980s until his retirement), he officiated six Stanley Cup

Stanley Cup

The Stanley Cup is an ice hockey club trophy, awarded annually to the National Hockey League playoffs champion after the conclusion of the Stanley Cup Finals. It has been referred to as The Cup, Lord Stanley's Cup, The Holy Grail, or facetiously as Lord Stanley's Mug...

 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.