PHOENIX -- Cubs manager Rick Renteria was not ready to name a fifth starter on Saturday, but one pitcher in the mix is left-hander Tsuyoshi Wada, who struck out 10 for the third time this season at Triple-A Iowa on Friday.
Wada, 33, leads the Pacific Coast League with 120 strikeouts and ranks second with 113 2/3 innings pitched. The lefty is fourth in ERA (2.77) and fifth with a 1.16 WHIP. He picked up his 10th win Friday and joins Kyle Hendricks with double-digit wins this year. Hendricks already has been named the Cubs' fourth starter, and will be in the rotation on Tuesday. The Cubs need a fifth starter for Wednesday against the Padres.
This year is the first time the Iowa Cubs have had multiple 10-game winners since 2010 when Jeff Samardzija and Jay Jackson each won 11, and Casey Coleman won 10.
Another option is right-hander Dan Straily, who was acquired from the Athletics in the trade that sent Samardzija and Jason Hammel to Oakland. Straily is 0-1 in two starts at Iowa, giving up four earned runs over nine innings. At Triple-A Sacramento this year, he was 4-3 with a 4.71 ERA in 10 starts.
"Straily has been throwing and has been trying to get back on track and we'll see how that develops and somewhere down the road, we'll see if he ends up fitting into that particular spot," Renteria said.
The Cubs need two starters in the second half to fill Samardzija and Hammel's spots in the rotation.
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.