Kyle Schwarber, Jason Heyward and Ian Happ became the first starting outfield to hit multiple homers in the same game, and the Cubs pounded the Cincinnati Reds 10-1 on Sunday for a split of their four-game series.
Schwarber hit the first and the last of the Cubs' season-high six homers, belting a solo drive in the fourth against Luis Castillo (0-5) and a grand slam off Jose De Leon in the ninth. Heyward connected for solo drives in the fourth and sixth, and Happ hit a two-run shot in the fifth and a solo homer in the seventh.
Joey Votto homered in the sixth for Cincinnati, which rallied for a doubleheader split against Chicago on Saturday. Castillo allowed four runs and five hits in five innings.
Cubs right-hander Tyler Chatwood left in the third inning with right elbow discomfort. Colin Rea, Jose Quintana (1-0), Ryan Tepera, Kyle Ryan and Duane Underwood Jr. then combined for 6 2/3 innings of two-hit ball.
Castillo, a National League All-Star last season while going 14-8, had allowed one homer all season before surrendering three against the Cubs. He struck out seven and walked one.
Jon Lester (2-1), Tuesday's starter in Pittsburgh, allowed one run in six innings in his last start against the Pirates, a 2-1, 11-inning Cubs win on Aug. 2.