Regin, 28, was acquired by the Blackhawks with forward Pierre-Marc Bouchard from the New York Islanders on Feb. 6 for a fourth-round pick in the 2014 NHL Draft. He signed a one-year, $650,000 contract on July 1, but was placed on waivers by Chicago on Saturday. He had four goals and 11 points in 61 games last season for the Islanders and Blackhawks.
Leighton, 33, agreed to terms with the Blackhawks on a one-year contract in August after he spent last season with HC Donbass of the KHL. He is 35-41-10 with a 2.97 goals-against average and .901 save percentage in 105 NHL regular-season games with the Blackhawks, Nashville Predators, Philadelphia Flyers and Carolina Hurricanes. He is 8-4 with a 2.54 GAA and .912 save percentage in 16 Stanley Cup Playoff games, including a League-record three shutouts against the Montreal Canadiens in 2010 Eastern Conference Final.