After being drafted by the Mets in the fifth round of the 2010 amateur draft outfielder Matt den Dekker spent three seasons in the minors before making his Major League debut on August 29, 2013. As the Mets starting centerfielder he went 0-5 in the Mets 11-3 win over the Philadelphia Phillies. Two days later he would record his first major league hit against the Washington Nationals, an RBI single in the Mets 6 run 3rd inning. Than on September 1st he recorded his first career home run also against the Washington Nationals.
Overall den Dekker appeared in 27 games for the Mets in 2013 hitting .207 with a home run and 6 RBIs.
In 2014 den Dekker split his time between the Mets and the Las Vegas 51s, the Mets top minor league affiliate. In 53 games for the Mets he hit .250 with 7 RBIs.
Just prior to the 2015 season the Mets traded den Dekker to the Washington Nationals in exchange for lefty reliever Jerry Blevins.
In 80 game over two seasons with the Mets den Dekker hit .238 with a homer and 13 RBIs.
While with the Mets den Dekker wore number 6.
Matt den Dekker also played for the Washington Nationals in 2015 and 2016.