Access the Mets beat like never before Join Post Sports+ for exciting subscriber-only features, including real-time texting with Mike Puma about the inside buzz on the Mets. Try it free PITTSBURGH — Mark Vientos’ return from the injured list Friday wasn’t enough to dislodge a rookie infielder from his roster spot. Ronny Mauricio was certainly vulnerable, given the Mets’ abundance of infield options and the need to provide him with regular playing time after he missed last season rehabbing multiple knee surgeries. But the club instead chose to option Jared Young to Triple-A Syracuse. Mauricio, who was in the starting lineup as the second baseman in the Mets’ ugly 9-1 loss to the Pirates , may