Sizing up candidates to bolster Mets’ infield

While the Mets continue pondering the acquisition of another starting pitcher or even, potentially, a reliever, their main focus remains in the infield. Between now and the start of Spring Training, they are likely to acquire one more bat to round out their lineup. Four primary candidates remain, according to people with knowledge of the situation, each candidate replete with pros and cons. Here is a look at whom the Mets might acquire.