On July 7, 2015 The Cubs sweep a doubleheader at home for the first time since 2003 as they dispose of the Cardinals, 7 – 4 and 5 – 3. They score thrice in the 7th inning of the nitecap to ensure the double win, a frame which features Cards P Seth Maness being ejected for arguing that Addison Russell’s single down the first base line is foul, and his successor Kevin Siegrist throwing a potential double play grounder by Dexter Fowler into the outfield.

Source:
Baseball Reference July 7