The 24-year-old d'Arnaud was hitting .304 with two home runs and 12 RBIs in 19 games. He broke his left foot on April 17 and returned on July 24.
Mets manager Terry Collins said he likes what he's seen from d'Arnaud.
"His confidence back there and the way he handled some of the older pitchers in spring training was impressive," he said.
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