Extra bases

• Remember the Reds' Jackie Collum? How about Harry Perkowski? Ken Raffensberger? Fred Baczewski?

The Cubs faced those pitchers from Aug. 11-13, 1953, in a four-game series over three days, the last time they had to deal with four left-handed starters in a single four-game series until this week. On Monday the Cubs opened a four-game set against the Rockies, beginning with Yohan Flande, the first of four southpaws.

This is the first time the Cubs will face four straight lefties since Sept. 21-25, 2007, when they dealt with the Pirates' Paul Maholm, Zach Duke and Tom Gorzelanny, and the Marlins' Dontrelle Willis.

And this Rockies series may not be the end of it. On Friday the Cubs travel to Los Angeles, where they are scheduled to face lefty Hyun-Jin Ryu.

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