Ryan McMahon pumped his fist, German Marquez let loose with a roar and Michael Toglia flashed a little kid’s grin. Good times.

Then it all fell apart.

In the second inning, the Rockies pulled off the fifth triple play in franchise history.

But the Rockies blew a 3-0 lead and lost 7-4 to the Athletics on Saturday night at Coors Field. Colorado has lost six straight and opened the season 1-7, tying the 2005 club for the worst eight-game start in franchise history.

The gory details are coming, but first, the highlight reel.

Marquez walked Shea Langeliers to open the second inning, and Tyler Soderstrom reached first on an infield single. Then, Jacob Wilson hit a hard one-hopper to McMahon at third, who stepped on third and fired to second baseman Kyle Farmer, who threw hard to Toglia at first, beating Wilson by a step.

It was the first triple play in the majors this season and the Rockies’ first triple play in almost a decade. The last time Colorado pulled it off was on Sept. 1, 2015, at Coors Field.

Following Saturday’s three-for-one special, Sean Bouchard hit a two-run homer to left in the bottom of the frame. Colorado added another run in the third. Then the game unraveled.

Marquez, so sharp in his first start of the season at Philadelphia (six scoreless innings, four hits, no walks and four strikeouts), lost his edge. He walked six in five-plus innings, including two leadoff walks. The veteran right-hander was charged with four runs (three earned) on five hits. He struck out three.

The free passes haunted Marquez in the sixth inning when the A’s took a 4-3 lead. He walked JJ Bleday and Langeliers, setting up Soderstrom’s run-scoring double to right. Out came Marquez, and in came righty reliever Jimmy Herget, who promptly served up a two-run double to left by Wilson.