Cubs 4, Brewers 0

Jake Arrieta pumps his fist toward the crowd after recording his 20th win of the season.

Jake Arrieta celebrates after recording his 20th win of the season.

Jake Arrieta celebrates with teammate Anthony Rizzo after Arrieta recorded his 20th win of the season.

Jake Arrieta is doused by his teammates after recording his 20th win of the season.

Jake Arrieta is doused by his teammates after recording his 20th win of the season.

Jake Arrieta is doused by his teammates after recording his 20th win of the season.

Jake Arrieta is doused by his teammates after recording his 20th win of the season.

Jake Arrieta waves to the crowd after recording his 20th win of the season.

Jake Arrieta waves to the crowd after recording his 20th win of the season.

Jake Arrieta is doused by his teammates after recording his 20th win of the season.

Jake Arrieta is doused by teammates Anthony Rizzo and David Ross after recording his 20th win of the season.

While giving an interview, Cubs players begin dousing starting pitcher Jake Arrieta after he recorded his 20th win of the season.

Jake Arrieta delivers in the ninth inning.

Addison Russell starts a double play to end the top of the 8th inning.

Jake Arrieta is congratulated by teammate David Ross after Arrieta shut down the Brewers in the seventh inning.

Dexter Fowler is congratulated in the dugout after a double by teammate Kyle Schwarber in the fifth inning.

Dexter Fowler slides in safely at home plate on a double by teammate Kyle Schwarber in the fifth inning.

Brewers shortstop Jean Segura misplays a fly ball hit by Kyle Schwarber in the fifth inning.

Kris Bryant is congratulated in the dugout after hitting a two-run homer in the third inning.

Kris Bryant is congratulated by teammate Kyle Schwarber after Bryant hit a two-run homer in the third inning.

Kris Bryant watches the flight of his two-run homer in the third inning.

Kris Bryant hits a two-run homer in the third inning.

Kris Bryant hits a two-run homer in the third inning.

Jake Arrieta delivers in the first inning.

Jake Arrieta delivers in the first inning.

Jake Arrieta walks to the dugout after shutting down the Brewers in the first inning.

Jake Arrieta and catcher Miguel Montero walk to the dugout before the start of the game.

Joe Maddon and his wife Jaye applaud during the ceremonial first pitches.

Javier Baez sports a tattoo of the MLB logo on his neck as he prepares for the game.