The Mets came out on a mission in the first game of Thursday’s doubleheader, shutting out the Rockies, 1-0, behind the arm of Marcus Stroman at Citi Field.

In a depleted rotation, Stroman has been arguably the Mets’ most consistent arm. On Thursday, he attacked the strike zone and utilized his defense as support. Stroman, who has a 55.2 percent ground-ball rate this season, induced 10 ground-ball outs against Colorado.

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Stroman allowed three hits and two walks and struck out three in six innings. Though 3-4 after some hard-luck losses, Stroman has a 2.47 ERA with 45 strikeouts on the season. He’s one of three Mets pitchers in the National League’s top 15 in ERA, along with Taijuan Walker (2.05) and Jacob deGrom (0.80).

The Mets had only one hit through two innings against Rockies starter Germán Márquez, who had retired five in a row heading into the third. However, on the first pitch of the third, José Peraza hit a homer over the left-field wall -- his second of the season -- to break the scoreless tie.