Farrell left the door open for changes depending on how Game 6 progresses Wednesday night at Fenway Park with the Red Sox ahead in the series 3-2. Peavy has struggled in his past two postseason outings, and the Red Sox figure to have all hands on deck if the teams meet in a winner-take-all scenario Thursday.
The wild card is lefty Felix Doubront, who has looked solid in 4 2/3 innings of relief this series. Farrell said Doubront is available for multiple innings in Game 6, but if the Cardinals force another game and Doubront is not utilized in a Game 6 loss, there is the possibility for changes.
Farrell hinted he would only worry about Doubront's status if the Red Sox lose.
"We wouldn't hold him back for tomorrow," he said.
Doubront threw multiple innings in Games 3 and 4. That sort of contribution would be in the cards Wednesday night, if Farrell goes to the young southpaw.
"Just talking to him yesterday during the workout, he felt good yesterday," Farrell said. "That will always be in-game, how things are going. But yeah, multiple innings, I would expect him to be available for that."
Clay Buchholz could "possibly" be ready to contribute in Game 6, Farrell said, and Jon Lester figures to be in the mix for a potential Game 7. Lester threw 7 2/3 strong frames to win Game 5 on Monday night in St. Louis.
"They'll be available before this is over," Farrell said of Buchholz and Lester.
Tony Lee is a contributor to ESPNBoston.com.