Career
Mats Rosseli Olsen started his professional career in 2008 in the Norwegian GET-league, playing for Furuset, where he grew up. In the 2008-2009 season, he noted 20 points in 44 games. In 2009, he joined Vålerenga.
After two and a half seasons in Vålerenga, he signed a one and a half-year deal with Frölunda The Human Context of the Swedish Elitserien on January 28, 2012.
Rosseli Olsen has also represented the Norwegian national team