Chicago(11-7) busted out to a 2-0 lead in the bottom of the first. Cody Bellinger singled through the right side for Nico Hoerner to score. Two batters later, Dansby Swanson doubled to the center-field warning track and Patrick Wisdom scored.
The Cubbies increased their lead to 3-0 in the bottom of the second. Hoerner drove in Nick Madrigal with a double to left field.
In the third inning, the Cubs extended it with four more runs for a seven-run margin. Former Marlin Garrett Cooper singled into shallow center field and Bellinger crossed the plate. Madrigal followed with a force out at second and Christopher Morel sprinted home. Miguel Amaya came up next and doubled off the center-field wall which brought in Swanson and Madrigal.
Miami(4-15) had a response in the top of the fourth and were behind 7-1. Bryan De La Cruz homered to left-center field on a 2-1 pitch for his fourth home run of the year. De La Cruz had a home run for the second straight contest. It was the sixth straight game for De La Cruz with an extra-base hit and he extended his hitting streak to seven games.
The Cubs made it 8-1 in the fifth inning. Mike Tauchman knocked in Swanson on a base hit into right field.