Cubs 2, Diamondbacks 0

Cubs center fielder Dexter Fowler, left, throws the ball to third baseman Kris Bryant after getting an out.

Cubs center fielder Dexter Fowler, rear, is congratulated by third base coach Gary Jones while rounding the bases after hitting a home run during the fifth inning.

Cubs relief pitcher Hector Rondon delivers a pitch against the Arizona Diamondbacks.

Cubs relief pitcher Hector Rondon makes the final out at first.

Cubs relief pitcher Hector Rondon makes the final out.

Cubs players celebrate their victory over the Arizona Diamondbacks.

A young fan wipes away sweat from his forehead during the national anthem.

Cubs shortstop Starlin Castro is unable to field a ball in the second inning.

Cubs second baseman Addison Russell leaps over Arizona Diamondbacks third baseman Jake Lamb as he makes the throw to first during the second inning.

Cubs second baseman Addison Russell makes a diving catch on a ball hit by Arizona Diamondbacks center fielder A.J. Pollock.

Cubs starting pitcher Jake Arrieta talks to catcher David Ross.

Cubs second baseman Javier Baez dives back into third during the fourth inning.

Cubs center fielder Dexter Fowler touches home plate after hitting a home run during the fifth inning.

Cubs center fielder Dexter Fowler is unable to reach a ball hit by Arizona Diamondbacks catcher Jarrod Saltalamacchia.

Cubs center fielder Dexter Fowler looks back at a ball welding fan after he was unable to reach a ball hit by Arizona Diamondbacks catcher Jarrod Saltalamacchia.

Cubs starting pitcher Jason Hammel fields a ball hit by Arizona Diamondbacks third baseman Jake Lamb.

Umpires check the instant replay before overturning a safe at home call.

Cubs relief pitcher Hector Rondon watches from the mound after he was unable to field a ball.