Rookie Christian Koss hit a grand slam, Jung Hoo Lee and Willy Adames also went deep and the San Francisco Giants overcame a shaky start by unbeaten Robbie Ray to overtake the visiting Arizona Diamondbacks 10-6 on Tuesday night.

Ray (6-0) allowed three runs in the top of the first, then no more over the next five innings to join Max Fried of the New York Yankees as the only pitchers to start the season 6-0.

Corbin Carroll, whose two home runs powered Arizona’s 2-1 win in the series opener on Monday, launched his 14th homer in the seventh inning to pull the Diamondbacks within 7-4.

He was on deck in the eighth when Arizona, still trailing by three, loaded the bases with one out against Giants reliever Camilo Doval. But the former closer got Ketel Marte to ground a comebacker that went as a home-to-first double play that ended the inning.

Koss, playing in his 23rd major league game, gave the Giants the lead for good with his first career home run in the second inning.

After Arizona starter Brandon Pfaadt (6-3) had walked Adames and Patrick Bailey following a Wilmer Flores single, Koss lifted his slam to left field, flipping a 3-0 Diamondbacks lead into a 4-3 Giants advantage.

Adames made it 6-3 against Diamondbacks reliever Juan Morillo in the fifth with his fifth homer of the season, a two-run shot. The Giants added a third run in the inning on Morillo’s wild pitch.

Pfaadt lasted just four innings, charged with four runs on six hits. He walked three and struck out three.

Ray was pulled with a 7-3 lead after six innings, having allowed seven hits and three walks. He struck out nine.

Moments after Doval squelched the Diamondbacks’ late threat, Lee’s fifth homer of the year, a three-run shot off Joe Mantiply, made it 10-4.

Arizona’s Josh Naylor capped the scoring with his fifth homer, a two-out, two-run bomb off the Giants’ fourth pitcher, Spencer Bivens, in the ninth.

Mike Yastrzemski totaled three hits, while Koss, Lee, Adames, Flores and LaMonte Wade Jr. had two apiece for the Giants, who snapped a four-game losing streak. Adames and Flores scored twice each.

Naylor, who contributed a two-run single to Arizona’s three-run first, finished with two hits and four RBIs for the Diamondbacks, who have alternated losses and wins in their last 11 games. Tim Tawa collected three singles, Carroll and Lourdes Gurriel Jr. had two hits each, and Carroll and Eugenio Suarez scored twice apiece.