Alex Rodriguez will make his Grapefruit League debut at first base on Sunday against the Astros.
Jordan Zimmermann admitted Friday that the chances he signs a contract extension with the Nationals are "not looking good."
Mets manager Terry Collins indicated Friday that Daniel Murphy (hamstring) is likely to begin the season on the disabled list.
Jon Gray is now slated to start Saturday's Cactus League game versus the Indians, replacing Tyler Matzek.
Jordan Zimmermann gave up one run over six innings as the Nationals and a Cardinals split-squad played to a 1-1 tie.