Only a week ago, hours before the trade deadline came and went, Nick Grossmann was on the ice practicing with the Flyers.

He didn’t want to reveal too much. Other than saying a workout with his teammates was the most he had done in recovering from his upper-body injury, all he offered was a smile and “sorry, guys” when reporters pressed on.

A week later, he was seeing a specialist in Pittsburgh. His upper-body injury is a concussion, sustained in a March 22 practice, and the 28-year-old Swedish defenseman is having vestibular trouble. In other words, he’s having a hard time balancing himself.

According to Flyers general manager Paul Holmgren, Grossmann will miss another two to three weeks after initially being deemed “day-to-day.” Unless the Flyers make the playoffs, Grossmann’s season is over.

The news is better for Danny Briere, who skated with the team for the third day in a row. Holmgren said Briere may play in tonight’s game against Ottawa. He, too, has missed the last nine games with a concussion. He, too, was concussed in practice, one day after Grossmann went down.