In those games - a 3-2 win in Pittsburgh and a 2-1 overtime defeat in St. Louis - the Flyers surrendered a total of just three regulation goals.
"Chris is a great player, but we showed we can do the job without him," O'Donnell said. "We just need to tighten up."
Pronger is expected to be sidelined until late January because of his latest injury, a broken right foot.
Compounding matters is that defenseman Kimmo Timonen is playing through a leg injury.
"We're not as sharp as we were, and we're making mistakes and it's in our net," O'Donnell said. "Teams get up for the Philadelphia Flyers. We're getting teams' best effort, and if we don't bring our 'A' game, we're not going to win."
O'Donnell said the Flyers (23-10-5) needed to get back to basics.
"We have to keep working hard, not give up power-play chances, and gut out some 2-1 wins," he said.
The ominous news is this: On Sunday at 5 p.m., the Flyers play at high-scoring Detroit, where they are 0-13-2 since their last win at the Joe Louis Arena, in 1988.
The Red Wings (24-9-5), leaders in the Western Conference, will be hungry. They are coming off Friday's stunning 4-3 overtime loss to the visiting Islanders.
Breakaways. Defenseman Erik Gustafsson might make his NHL debut Sunday and replace Oskars Bartulis. . . . The Flyers went 8-4-1 in December. . . . Winger Nik Zherdev has been benched for stretches in each of the last two games because of his inconsistent play. . . . Jody Shelley's two-game suspension has ended, and he is eligible to play Sunday. . . . Injured winger Ian Laperriere, whose defense the Flyers could use, will accept the team-of-the- year award for the Flyers at the Philadelphia Sports Writers Association's banquet Jan. 31 at the Crowne Plaza Hotel in Cherry Hill. Several Philadelphia athletes will be honored, including the Phillies' Roy Halladay (pro athlete of the year) and Shane Victorino (humanitarian of the year) and former Eagle Bill Bergey (living legend award). Tickets are available at www.pswa.org. . . . The Flyers are 3-4-3 against Western Conference teams. . . . Entering Saturday, Detroit was tied with Colorado for the NHL's most goals (131).
Contact staff writer Sam Carchidi at 215-854-5181 or firstname.lastname@example.org. Follow on Twitter at www.twitter.com/BroadStBull.