Career
Marouelli"s National Hockey League career started on November 2, 1984, and wore a helmet while refereeing National Hockey League games starting from the 1996-1997 National Hockey League season. Entering the 2007-2008 season, Marouelli had officiated 1,411 regular season games and 179 post-season games. He also worked the 1999, 2000, 2001, and 2003 Finals and two All-Star games.
On November 29, 2008, he officiated his 1,500th game between the Toronto Maple Leafs and Philadelphia Flyers.
Flyers captain Mike Richards presented Marouelli with a team-signed stick, while Maple Leaf Tomáš Kaberle presented a photo of Marouelli signed by the Leafs. On April 10, 2010, he officiated his last National Hockey League game, between the Toronto Maple Leafs and Montreal Canadiens.
At the conclusion of the game, both teams showed their appreciation for his long career by shaking his hand. In total, he officiated 1,622 regular season games and 187 playoff games.
In August 2010, Marouelli signed as an assistant coach with the Penetang Kings of the Georgian Mid-Ontario Junior C Hockey League.