Westbrook (13-11, 3.97 DERA) has yet to throw competitively since being shut down Sept. 8. "I want to try and help this team win some ballgames," he said. "If I can, it would have to be out of the bullpen."
Westbrook is still early on the rehab trail and realizes that he will not be able to reach the stamina level needed of a starting pitcher. He was shut down after just a few pitches during a bullpen session a week ago.
Westbrook struggled down the stretch last season and made only two postseason relief appearances during the Cardinals' run to the World Series title.
This time around, he was looking to play a bigger role in the postseason festivities.
"This year, I felt like I would be one of the four or five guys [in the rotation]," he said.
St. Louis manager Mike Matheny will not divulge his pitching plans until the Cardinals officially nail down a playoff spot.
For now, Westbrook is a long shot to make a postseason roster.