The Mets are looking for an upgrade behind the plate and they're rumored to have interest in Ramon Hernandez of the Rockies. According to MLB.com's Peter Gammons (on Twitter), they have considered Kelly Shoppach as an alternative if the price to land Hernandez is too high, however.
New York's backstops have produced a .244/.303/.298 batting line this season, the third worst catcher OPS in the NL. Shoppach has put up a .269/.358/.527 line while backing up Jarrod Saltalamacchia, and he's historically done most of his damage against left-handers. As Gammons notes, a trade would allow the Red Sox to bring Ryan Lavarnway up from Triple-A, where he's hitting .306/.395/.455.