"Maybe," van Riemsdyk said when asked if he would play Saturday.
Van Riemsdyk, 22, who said the fogginess he had been experiencing has diminished, was able to take contact at Friday's practice.
Van Riemsdyk said it's how his body feels that will determine when he returns.
"I wish it was up to me," he said of returning. "If that was the case, I would have been playing a month ago."
In the last 15 games without him, the Flyers are 6-6-3.
Saturday's 1 p.m. game will match Pittsburgh's Evgeni Malkin and Claude Giroux. Entering Friday, Malkin led the NHL with 69 points - two more than the Flyers' Giroux.
Hulking defenseman Nick Grossman, acquired Thursday from Dallas, practiced with the Flyers on Friday for the first time and was paired with Andrej Meszaros.
"He's a defenseman we need right now - with big size," said Meszaros, adding it may take Grossman a game or two to learn a new system.
Grossman, 27, said the deal "came out of the blue kind of, so it's a little shocking. I had mixed feelings at first, but once I got settled down it got real exciting."
The 6-foot-4, 230-pound Grossman is expected to give opponents second thoughts about setting up camp in front of the net or skating through the slot.
"I try to use my body out there, being physical and hard to play against . . . bring some toughness," he said.
To make room for Grossman on the roster, Erik Gustafsson was sent back to the Phantoms - one day after scoring his first NHL goal.
Surgery for Sestito
Winger Tom Sestito will have surgery Tuesday to repair a torn groin muscle, the Flyers announced. Sestito was injured in a fight with Buffalo's Zack Kassian, and he is expected to miss six to eight weeks.
Mr. Universe
Twenty-three military personnel from the Maguire-Dix-Lakehurst base visited the Flyers in their locker room after practice. The visitors represented the Army, Air Force, and Marines.