Contreras’ slam powers Arrieta, Cubs to 12-8 win over Reds

CINCINNATI  — Wilson Contreras hit his first career grand slam and Anthony Rizzo and Jason Heyward added three-run shots on Saturday, powering the Chicago Cubs to a 12-8 victory over the Cincinnati Reds.

Jake Arrieta (3-0) returned to the mound where he threw his second career no-hitter last April 21 and struggled mightily at the outset, giving up two homers in the first inning. Chicago’s offense pulled him through with another homer-heavy game at Great American Ball Park. Arrieta helped with an RBI triple.

In the series opener, Rizzo’s three-run homer tied it with two outs in the ninth and set up a 6-5 win in 11 innings. He connected in the first inning on Saturday against left-hander Cody Reed (1-1), who was moved into the Reds’ injury-depleted rotation. Contreras hit his grand slam in the second, which was Reed’s final inning.