Career
Undrafted, Holmstrom signed a two-year entry level contract with the Philadelphia Flyers on March 17, 2010 after playing four seasons of collegiate hockey with UMass Lowell. Holmstrom was called up on March 3, 2011 and made his National Hockey League debut against the Toronto Maple Leafs. On July 3, 2014, Holmstrom left the Flyers organization after four years to sign a free agent contract with the Carolina Hurricanes.
Holmstrom was assigned to AHL affiliate, the Charlotte Checkers for the duration of the 2014-2015 season, contributing with 20 points in 62 games, as the Checkers missed the post-season.
On July 2, 2015, Holmstrom signed as a free agent to a one-year, two-way contract with the New York Islanders.
