The punchless Rockies had no answers to the Colorado Kid and the “Polar Bear.”

Behind lefty David Peterson, a 2014 Regis Jesuit graduate, and slugging first baseman Pete Alonso, the Mets drubbed the Rockies 9-1 on a cool, cloudy afternoon at Coors Field. New York won the three-game series, halting a mini-streak by the Rockies, who had won three consecutive series at home.

Peterson, making his first start at Coors, limited the Rockies to one run on four hits over five innings. He struck out five and walked three. In three career games vs. Colorado, he’s 2-1 with a 2.12 ERA.

Alonso, nicknamed the Polar Bear by teammate Todd Frazier during spring training in 2019, won the 2021 Home Run Derby during the All-Star Game at Coors Field in 2021. His first two at-bats on Thursday were Derby-worthy and good for 925 feet.

In the Mets’ four-run first inning, he crushed a 471-foot, two-run homer off Austin Gomber. In the third, he blasted a 454-foot solo shot off Gomber. It marked the 21st multi-homer game of Alonso’s career and his second this season.

Gomber’s day was short and ugly. Over three innings, the Mets pounded him for five runs on six hits, including Alonso’s two homers. New York’s first inning included four doubles.

The first inning has been Gomber’s Achilles’ heel for most of the season. He’s allowed 28 of his 66 runs in the opening frame, the most in the majors. In the first, opponents are hitting .380 with nine doubles and six home runs. Gomber’s first-inning ERA is 11.46.

Colorado was outhit 13-7 by the Mets, and its lone run came in the fifth when Brenton Doyle drove in Aaron Schunk with a sacrifice fly.

Gomber’s day was short and ugly. Over three innings, the Mets pounded him for five runs on six hits, including Alonso’s two homers.

The left-hander remains an enigma. His magical May (1-0, 0.68 ERA over four starts) has been replaced by inconsistency. In 12 starts since then, he’s 2-5 with a 7.01 ERA.