I know I'm going against the trend here, but I say Samsonov.
Not that I have much faith in him but I instead look at the worst case: If Woll bombs in game 2 (which is entirely possible given he hasn't been great himself lately either), then what? Jones is not a realistic option.
Keefe himself didn't put the loss on Sammy so to turn around and switch now yells desperation and would rightly lead Samsonov to complain loudly. "If it wasn't my fault, why the **** are you pulling me?"
And if he loses game 2 - even if he's not really to blame, then come back home and put Woll in. It's desperation time so fully justified. Maybe at home the team rallies around him, wins game 3 and we're back in it.