DENVER — At the conclusion of the National Anthem Sunday afternoon, Pete Alonso stood on the leftfield foul line, hat over his heart. Across the diamond, Rockies reliever Zach Agnos did much the same.

Neither moved. Seconds passed. Then minutes. Until finally, with first pitch drawing near, Agnos ceded, and Alonso celebrated with his signature leg kick.

That’s right: The game hadn’t even started, and Alonso was already beating opposing pitchers.

Alonso homered in the third and eighth innings to match and then pass David Wright for second-most homers in Mets history, as they walloped the Rockies, 13-5, at Coors Field. It was his franchise-leading 23rd multi-homer game, passing Darryl Strawberry. The first baseman went 12-for-30 (.400) on the road trip, with five homers, two doubles and 15 RBIs. Sunday, he was 3-for-6 with three runs and four RBIs.

Jeff McNeil added two homers of his own, while Brett Baty and Francisco Alvarez merely homered once apiece as the Mets (42-24) went on to collect 17 hits. They went 5-2 on this Western road trip, which was part of a stretch of 10 straight games and have the best record in the National League. The 18-games over .500 match last year’s high-water mark, set in September.

Ronny Mauricio, who was called up Tuesday and began his tenure going 0-for-11, was 2-for-3 with two runs and two walks Sunday. He’s now 5-for-8 with a homer since his double in the eighth inning of Friday’s game here. Juan Soto went 3-for-3 with three walks.

Tylor Megill, meanwhile, allowed two runs on three hits with three walks and five strikeouts over five.

McNeil, who homered Saturday, repeated the feat in the second inning Sunday, blasting Chase Dollander’s full-count fastball to nearly the same place he did the night before. It went 411-feet to the home bullpen in right to give the Mets a 1-0 lead. Mauricio, moved up to sixth in the lineup, picked up where he left off, too. A day after going 2-for-4 with a homer, he singled. Tyrone Taylor walked, and Mauricio came around to score on Alvarez’s single.

Alonso first homer came in the third. With Soto on second, he drove Dollander’s cutter 416-feet to leftfield, extending his on-base streak to 17 games.

Mauricio then collected his second single in as many at-bats, stole second, and came around to score on Taylor’s double, putting the Mets up 5-0. The Mets scored three more in the fourth: Soto and Alonso hit back-to-back, two-out singles, and McNeil went yard again, depositing reliever Juan Mejia’s fastball 404 feet to right for the 8-0 lead.

Sam Hilliard broke up Megill’s no-hitter with a leadoff double in the fifth and scored on Braxton Fulford’s single. Fulford came home on Jordan Beck’s double. The Mets made it 10-2 on Baty’s seventh-inning two-run homer. Hunter Goodman’s RBI single off Paul Blackburn cut that lead to 10-3 in the seventh.

Alonso added the exclamation point in the eighth, teeing off Tyler Kinley’s fastball and smacking it 372 feet to left, driving in Soto. It was his 17th homer of the year, and MLB-leading 61st RBI. Alvarez hit his second homer of the year, a solo shot, in the ninth. The Rockies scored two more off Blackburn in the bottom of the inning.

Frankie Montas (lat) allowed three runs on four hits with three walks and two strikeouts over 3 2/3 innings in a rehab outing with Triple-A Syracuse Sunday. He threw 76 pitches and allowed three homers. He also allowed four home runs in the rehab outing prior to this one. Carlos Mendoza said he will have at least one more.