The Flyers are looking for defensive help in the form of Shayne Gostisbehere.
Flyers announce Braydon Coburn and Andrew MacDonald will both be out for about a month.
The Columbus Blue Jackets pulled away in the third period to beat the Flyers 6-3 on Saturday night.
Philadelphia Flyers defensemen Kimmo Timonen and Andrej Meszaros are out indefinitely with lower-body injuries.
Hartnell scored his 29th and 30th goals – both on third-period deflections – and Matt Read netted the shootout winner as the Flyers overcame a three-goal, second-period deficit and beat the Calgary Flames 5-4 on Saturday night.
Sean Couturier had a short-handed goal to lead a balanced scoring attack and the Philadelphia Flyers beat the Minnesota Wild 5-1 Tuesday night.
Danny Briere, Braydon Coburn and Matt Read scored and Ilya Bryzgalov made 31 saves in the Philadelphia Flyers’ 3-2 victory over the Florida Panthers on Sunday night.
Brian Boucher stopped 25 shots and the Philadelphia Flyers advanced to the Eastern Conference semifinals with a 5-2 win over the Buffalo Sabres in Game 7 of their first-round series on Tuesday night.