I think Price is going to the bullpen in October.
Sale, Porcello, E-Rod, and Eovaldi will be in the playoff rotation.
The Yankees series will be interesting to watch in this regard. If Eovaldi pitches well, and Price does not, the Red Sox will have some of the justification to keep Eovaldi in the rotation while moving Price out in October.
Also, Price has generally been a failed starter in October. He has, however, pitched well from the bullpen in October. The track record is clear.