Scrivens played in the Alberta Junior Hockey League (AJHL) for two seasons. He broke into the league with the Drayton Valley Thunder during the 2004–05 season, playing a single game with the team before moving on to the Calgary Canucks. During his final year of junior hockey, Scrivens played with the Spruce Grove Saints. He won 27 games, while losing 12 and tying three, finishing the year with a 2. 43 goals against average (GAA) and . 921 save percentage. He was named the Saints' Most Valuable Player and Player of the Year for the 2005–06 season. Scrivens played in the AJHL All-Star game, and represented Team North at the 2006 Viking Cup, where they won the championship.