Left-handers Jon Lester and Patrick Corbin were locked in a pitchers' duel through five innings before Adam Rosales led off the sixth with an infield single. He moved to second on A.J. Pollock's groundout, and the Cubs intentionally walked Paul Goldschmidt to set up the double play.
Instead, Martinez doubled to score Rosales. Goldschmidt then scored on a throwing error by Javier Baez, and Brandon Drury capped the inning with a two-run double to left-center. In the eighth, David Peralta added an inside-the-park home run off Justin Grimm.