Number 10 retired by Sherwood Park Crusaders
Per Wikipedia link on Sherwood Park Crusaders: "# 10 Trevor Elton Trevor Elton was captain of the Sherwood Park Crusaders during the 1979-80 season. In February 1980 during a game vs. the St. Albert Saints he was on the receiving end of a body check. Trevor collapsed and later died as a result of the hit. The Crusaders retired the number 10 jersey of Trevor Elton. A banner with Trevor's name and number was placed in the arena to honor him. The Crusaders also named the team's Most Valuable Player trophy after him." (external source)