Bay was released early last month by the Mets with $21 million remaining on his contract. His Seattle salary will be deducted from the Mets' obligation to him.
Bay's tenure in Queens was a colossal disappointment. He batted just .234/.318/.369 as a Met and lost more than a full season's worth of games to injury.
What does Bay promise the Mariners (assuming he passes his physical)? Not a great deal. He's deeply challenged in the field and not a suitable every-day player. So, in essence, he'll ideally be deployed as the right-handed half of a DH platoon on those occasions when Jesus Montero is behind the plate against lefties. That's an awfully circumscribed role, which makes one wonder whether Bay -- even healthy and in rebound -- is worth the roster spot.