Extra bases

• Cubs No. 3 prospect Addison Russell played last season in the Arizona Fall League, but Chicago wants the shortstop to do so again, starting Oct. 7. Why?

"It's all about the at-bats for Russell," Epstein said.

Russell missed time earlier this season because of a hamstring injury.

• Felix Doubront is expected to start the first game of Saturday's doubleheader against the Cardinals with Tsuyoshi Wada starting the second game. The day-night doubleheader is a makeup of a May 14 game in St. Louis.

Carrie Muskat is a reporter for MLB.com. She writes a blog, Muskat Ramblings, and you can follow her on Twitter @CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.