Stall was cut by the skate of Montreal Canadiens defenseman P.K. Subban during a collision near the Pittsburgh blueline midway through the Penguins' 6-3 victory Friday in Game 1. He underwent surgery to repair a damaged tendon on top of his foot, but was expected to return to action during the playoffs.
"I know there were a few chuckles when I said he is day to day. But he is day to day," Penguins coach Dan Bylsma said. "He's doing well and progressing and you saw him on the ice for a short time without his gear on testing out his foot in the skate."
The Penguins and Canadiens play Game 3 of their Eastern Conference semifinal on Tuesday. The series is tied 1-1.
Bylsma would not speculate on when Staal might return to the lineup.
"Right now he just has to heal from a surgical wound and get back in his boot and be comfortable doing that. So there's not a risk in terms of weighing if he should play or shouldn't play," Bylsma said.
Veteran forward Bill Guerin did not take part in the morning skate and there was speculation he might not be able to play Tuesday night. If he can't go, rookie center Mark Letestu will join the lineup, with Pascal Dupuis likely taking Guerin's spot on the team's top line with Sidney Crosby and Chris Kunitz.
Blysma said Guerin would be a game-time decision.
Scott Burnside covers the NHL for ESPN.com.