In just his second game back with the Flyers, James van Riemsdyk suffered a lower-body injury during the first period of Saturday night's contest against the Avalanche and did not return.
The left winger blocked two shots in a three-second span around the midway point of the opening period. He played 5:13 and never came out for the second stanza.
The severity of the injury is unknown as there was no further update.
"I'm concerned that he wasn't able to come back," Flyers head coach Dave Hakstol said postgame. "I don't know the extent of it, so we've got to wait until we get back. We're at the end of a long trip here, so we'll get home and figure out where everything is at."
The addition of van Riemsdyk on Day 1 of free agency was the Flyers' biggest signing in the Ron Hextall era. JVR, who inked a five-year, $35 million deal on July 1, scored 36 goals in 2017-18 for the Maple Leafs, while his 65 tallies over the past two seasons were tied for 15th most in the NHL with John Tavares.
van Riemsdyk, drafted second overall by the Flyers in 2007, has opened his reunion on the third line, joining rookie center Mikhail Vorobyev and right winger Wayne Simmonds. It marks a major improvement in the Flyers' depth as van Riemsdyk and Simmonds both have a pair of 30-goal seasons to their name.
On Thursday night, van Riemsdyk had an assist and a plus-1 rating in 13:59 of ice time during the Flyers' 5-2 win over the Golden Knights.