If one takes a look at the depth chart of lefty relievers the Mets have at their disposal this season, it isn’t a pretty picture. At the top of the list sits Justin Wilson and below him is Daniel Zamora, who did not cover himself in glory in Saturday’s exhibition game, Chasen Shreve, and not much else. That fact alone makes Wilson close to indispensable to the Mets’ bullpen. Despite the fact that he was used in Saturday’s summer camp game against the Yankees to record just one out against a left-handed batter, it is doubtful that Luis Rojas sees Wilson as a lefty specialist.