Details of the deal aren't yet known, and the Mets haven't actually acknowledged the signing, but several reports indicate that the team has inked Alex Cintron to a minor-league deal. I can't imagine this is much more than another moderately-recognizable name to fill out the Triple-A Buffalo roster.
Cintron appeared in 21 games with the Nationals in 2009, collecting just two hits and two walks in 28 plate appearances. He turned 31 in December and has only been above replacement once in his career, when he posted a 2.2 WAR with the Diamondbacks back in 2003.