Career
He was drafted by the Ottawa Senators in the third round (87th overall) of the 2004 National Hockey League Entry Draft and played his first five National Hockey League seasons with the organization. Prior to his National Hockey League career he played professionally in Europe. In 2004, he was drafted by the National Hockey League"s Ottawa Senators using the third-round draft pick of the Colorado Avalanche, received in a trade for Shane Hnidy with the Nashville Predators.
He played one more season with Herning.
In 2005, he joined Timrå IK in the Swedish Elitserien league. He played three seasons for Timrå, increasing his goal and point production in each season.
On June 2, 2008, Regin signed a multi-year entry-level contract with the Ottawa Senators. He was assigned to the Senators" minor league affiliate, the Binghamton Senators for the 2008-2009 season.
Due to injuries in Ottawa, he was called up and made his National Hockey League debut on January 20, 2009, in a game against the Washington Capitals.
He was returned to Binghamton one day later, registering no points in his National Hockey League debut. Since beginning his National Hockey League career, Regin has contributed to the rise in popularity of ice hockey in his native Denmark. In July 2010, Regin was re-signed to a two-year contract extension worth United States$2 million by the Senators.
His 2010-2011 season was a disappointing one as he registered only 3 goals and 17 points in 55 games, before he suffered a season-ending shoulder dislocation in a game against the Toronto Maple Leafs when he was pushed into the boards by Toronto"s Joey Crabb on February 19, 2011.
In April, 2012, the Senators announced that Regin was re-signed to a further one-year, one-way contract. On July 5, 2013 he signed a one-year deal with the New York Islanders.
However, he was traded on February 6, 2014 to the Chicago Blackhawks along with Pierre-Marc Bouchard in exchange for a 2014 fourth-round draft pick. On July 1, 2014, Regin was re-signed by the Blackhawks on a one-year contract.
During the Blackhawks" training camp, Regin was assigned, along with goaltender Michael Leighton, to their AHL affiliate, the Rockford IceHogs, after clearing waivers.
On May 11, 2015, Jokerit announced that it had agreed to terms with Regin on a two-year contract.