Extra bases

• The Cubs will go with a six-man rotation, and keep Jacob Turner and Felix Doubront in the mix for now.

Jake Arrieta started Tuesday and was to be followed by Kyle Hendricks in the series finale against the Brewers. Tsuyoshi Wada, Doubront and Travis Wood, all lefties, will face the Pirates this weekend at Wrigley Field. Turner, who made his second start for the Cubs on Monday, will open a three-game series in Toronto on Sept. 8.

The Cubs want to see Doubront, acquired from the Red Sox on July 30 for a player to be named later, and Turner, who they got from the Marlins for two Minor League players.

Dan Straily and Eric Jokisch, both starters at Triple-A Iowa, who were promoted Tuesday, will likely piggyback off the Cubs starters in the final 20 plus games.

• Class A Kane County opens the 2014 Midwest League playoffs on Wednesday at Wisconsin. Game 1 will be played in Appleton, Wis., with the second game of the best of three series Thursday at Fifth Third Bank Ballpark. This is the 14th playoff appearance in the Cougars' 24-year history, and first trip since 2011. Manager Mark Johnson's team won a franchise record 91 games.

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.