Yesterday, the Mets signed Rod Barajas to a major-league deal. That means Barajas must be added to the 40-man roster.
The Mets already have 40 players on the roster, so someone will have to be designated for assignment.
Also yesterday, the Mets were looking to void their waiver claim on Jay Marshall due to a preexisting shoulder issue. If they are able to quickly get their claim pulled back on Marshall, the Mets might not have to DFA anyone else.
As Eric Simon of Amazin Avenue suggested on Twitter, Arturo Lopez is another candidate to be DFA’d, as he really has no chance to make the team and isn’t very good anyway. (In 35 minor league games last season: 30 1-3 IP, 3.86 ERA, 1.615 WHIP, 13 BB, 19 K.)
Either or, I’m assuming Marshall or Lopez will be DFA’d (likely today) to make room for the Mets newest catcher.