Arrieta (1-0) got a warm reception prior to the game, then gave up just one run and six hits. The 35-year-old right-hander struck out five and walked one.
Arrieta played 4 1/2 years for Chicago, winning a Cy Young Award and a World Series, before signing with Philadelphia in March 2018. He returned to the Cubs in February for a $6 million, one-year contract.
“I’ve been anticipating this day for awhile,” he said.
The Cubs have, too.
“It brought back good memories of having him on the mound and pitching against the Pirates, good memories of him doing that a lot,” Bryant said.
One of Arrieta’s most memorable performances with the Cubs was his five-hit shutout in the 2015 wild-card game at Pittsburgh. He struck out 11 and did not walk a batter.
The Cubs beat St. Louis in their division series before losing to the Mets in the NLCS. A year later, they won it all, ending a championship drought dating to 1908.
Arrieta said he spent the past few days riding his electric scooter around the city, taking in the familiar old sights and mingling with the fans as much as he can.
“I look forward to more scooter rides, meeting more people,” he said.
Bryant made it 3-1 in the third with a solo homer to the center-field basket against Tyler Anderson, pointing to his baby son in the stands after crossing the plate. Heyward bumped the lead to three with a long drive to the right-field bleachers off Clay Holmes in the sixth. And the Cubs added another run in the seventh when Bryant walked and scored.
Javier Baez singled twice, drove in a run and scored one. He also stole two bases.
“J-Hey’s home run was loud,” manager David Ross said. “I don’t know if you could tell on TV or in the stadium. It was extremely loud. It was nice to hear that. Up and down the lineup, I thought we did a really good job.”
Heyward called his drive on a 3-1 sinker a reward for “doing things right and being on time.”
“Tried to be aggressive in the zone,” he said. “I feel like like they’ve done a good job these two games attacking us aggressively in certain counts, in certain times and then making us lay off a tough pitch. It was nice to get ahead right there and not miss one.”
Brandon Workman, Andrew Chafin and Craig Kimbrel each threw a perfect inning, combining to strike out seven and walk none. The Cubs avoided their first 0-2 start since the 2014 team lost the first two.
Pittsburgh’s Ke'Bryan Hayes left the game because of discomfort in his left wrist. He jammed his hand diving back to first on a pickoff attempt after walking in the first inning.
Anderson (0-1) went five innings in his Pirates debut, allowing three runs and five hits. The left-hander, who signed with Pittsburgh in free agency, struck out seven and walked two.
Pirates right-hander Kyle Crick was going through the intake process after being away from the team for the birth of his child. Manager Derek Shelton said he could be cleared as soon as Sunday. Crick had a 1.59 ERA in seven relief appearances last year.
RHP Zach Davies, acquired from San Diego for NL Cy Young Award runner-up Yu Darvish, makes his Cubs debut, while RHP Mitch Keller starts for Pittsburgh on his 25th birthday. Davies was 7-4 with a 2.73 ERA in 12 starts for the Padres last year after playing his first five seasons for Milwaukee. Keller had a 2.91 ERA in five starts for the Pirates.