Granlund made the announcement himself in a video message to Wild fans posted on the team's website.
He later told the team's website, "Now I'm a member of the Minnesota Wild and it's a dream for me. I'm really excited. … I've improved a lot of things. Everything as a player -- I'm stronger and I think I'm ready to play in the NHL next season."
The Wild selected Granlund with the ninth pick of the 2010 Entry Draft. A 5-foot-10, 180-pound center, the 20-year-old has been a star for three seasons with HIFK in SM-liiga, Finland's top league. He was fifth in the league in scoring in 2011-12 with 51 points in 45 games. He also had 11 points in seven games while captaining Finland at the 2012 World Junior Championship, and had five points in 10 games for Finland at the World Championship.
Last season, he had 36 points in 39 games and returned from a concussion to lead the league in playoff scoring with 16 points as HIFK won the league championship. He then added nine points in nine games to help Finland win the gold medal at the 2011 World Championship.