Matheny is hoping to see Martinez pick up right where he left off. In his only other Spring Training outing, Martinez blanked the Mets over three innings.
"He threw terrific in the WBC," Matheny said. "And he's up to 75 pitches or so already. So we're going to push him a little bit further and get him ready for the beginning of the season."
Martinez went 1-1 with a 1.13 ERA for the Dominican Republic in the Classic, striking out eight over eight innings.
"He's right where he needs to be right now [this spring]," Matheny said.
Martinez could make one more spring appearance after Wednesday and still be rested for an Opening Day start, should he get the nod.
Alberto Rosario, a catcher for Team Dominican Republic, also returned to camp on Monday, leaving only veteran catcher Yadier Molina still participating in WBC '17 with Puerto Rico.
Glenn Sattell is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.