Mets left-hander Jonathon Niese has been cleared to resume throwing after undergoing a favorable medical examination in New York, multiple sources with ties to the team told Niese underwent an MRI and was examined by team doctor David Altchek on Monday at the Hospital for Special Surgery in New York, a day after departing a Grapefruit League game against the St. Louis Cardinals after two innings with elbow discomfort. Niese received a cortisone injection in the back of his left elbow to address inflammation, but was informed his ligament is fully intact. He is expected to resume throwing Wednesday. Still, the likelihood is Niese opens the season on the disabled list, while remaining in Florida to build up his innings count.