Corbin is the likely choice to start Game 4 for the Diamondbacks in the NLDS, but it's not official, and he may be available out of the bullpen for Game 2 on Saturday, Eric Stephen of TrueBlueLA.com reports.
Arizona will look to even the series Saturday, so it may require Corbin to come in if Robbie Ray can't eat enough innings. Expect the D-backs to reveal a finalized rotation after Game 2.