Folin ended his career with Massachusetts-Lowell, finishing his sophomore season with four goals and 16 assists in 41 games. The deal was done late Monday while the Wild were in Los Angeles on their way to a win over the Kings.
Folin is expected to join the team in Chicago for the game Thursday against the Blackhawks. He will not be eligible for the playoffs.
The 6-foot-3, 215-pound Folin is a mobile puck-mover with a hard right-handed shot. The native of Gothenburg, Sweden, had a plus-10 rating and three game-winning goals for the River Hawks, who reached the NCAA Northeast Regional final.