WASHINGTON — The Mets gave themselves added leeway to sign international players Wednesday, when they traded prospect Milton Ramos to the Orioles in exchange for international signing bonus pool space. The Mets received an additional $1 million in bonus space, according to a source.

Ramos, 21, was hitting .227 with seven doubles, a triple, and 18 RBIs in 57 games for Class-A Columbia. A third-round selection in the 2014 draft, Ramos, a shortstop is a .242/.296/.312 hitter in 910 at-bats in the minors.

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The Mets began the season with $4.75 million in bonus pool money and inked seven international free agents when the signing period began on Sunday. That group included two highly-touted 16-year-olds out of the Dominican Republic: Ronny Mauricio and Adrian Hernandez.

Mauricio, a shortstop, reportedly signed for $2.1 million. He was Baseball America’s third-ranked international prospect. Hernandez, an outfielder ranked No. 16 by Baseball America, signed for $1.5 million.

Out of the Dominican Republic, the Mets signed outfielder Stanly Consuegra, shortstop Federico Polanco, and shortstop Patricio Diaz. The class also included outfielder Eduardo Salazar and righthander Robert Colina, both out of Venezuela.

Extra bases

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Wednesday night’s game against the Nationals was postponed by rain. No makeup date was announced . . . Outfielder Michael Conforto (bruised left hand) is headed to Port St. Lucie, where he may begin a rehab assignment Thursday. He’s eligible to come off the DL on Saturday . . . Jacob deGrom’s start has been pushed back to Friday against the Cardinals. The Mets have not decided who will pitch Saturday and Sunday. . . . The Mets have considered re-signing righthander Bartolo Colon, who will become a free agent on Thursday once he clears waivers, as expected. He was designated for assignment by the Braves after posting an 8.14 ERA in 13 starts.