There is no chance, 0% or less, that Stallings will win this game. But if ND doesn't show up for some reason, maybe 4 or 5 of their players are arrested or something, we might be able to stay within 20 of ND. For Pitt to win means that ND would have experienced the most monumental collapse in college basketball by any team this year or any year.
But to answer your question, no. Stallings does not deserve to keep his job just because of one lousy win. If he won the ACCT, I'd say he might deserve a second look, but not likely. He's already damaged the program too much and we need it fixed.