Sanheim enjoyed a productive sophomore season with the Flyers, finishing tied for first among the team's defensemen with nine goals and second in scoring with 35 points in 82 games. The 23-year-old also logged 19:34 of ice time per game and finished third on the team with 133 blocked shots.
The Flyers still have a number of contracts to sort out, and locking up a young talent like Sanheim on a bridge deal with a team-friendly cap hit gives them more room to operate.
Forwards Scott Laughton and Travis Konecny, along with defenseman Ivan Provorov, are all restricted free agents in need of a new deal. With the salary cap now officially at $81.5 million, the Flyers have a projected $18.1 million to work with, according to CapFriendly.
Sanheim was selected 17th overall by the Flyers at the 2014 draft.