Bishop, who missed five games from March 6 through March 14 because of the knee, returned to Dallas early and is awaiting the results of an MRI. He is to be re-evaluated in two weeks, but it sounds unlikely he'll be back before the end of the regular season.
"When we say we're going to evaluate it in two weeks, then you get the picture," Hitchcock said Tuesday morning.
In two weeks, the Stars will have two regular season games remaining -- April 6 at the Ducks and April 7 at the Los Angeles Kings. By then, their fate might be decided.
So, it likely will be up to Lehtonen to get the Stars to the playoffs. The 34-year-old backup made some timely saves among the 28 shots he stopped against the Capitals, including a point blank one on Alex Ovechkin with 3:45 remaining in the second period.
But Carlson's game-winning goal, which got past his catching glove on the short side, appeared stoppable.
"He's like the rest of us," Hitchcock said of Lehtonen. "Just battle, fight, battle. Whatever word you want to use, that's what we need to do."
The Stars were also missing forwards Martin Hanzal (season-ending back surgery), Jason Spezza (back), Brett Ritchie (lower body) and defenseman Marc Methot (hand), but as Hitchcock said Tuesday morning, "Who cares?"