Pending a physical to be taken in New York, the closer has reached a preliminary agreement for three years worth $37 million. This was a move that they HAD to make (or at least one of the moves). After the injury to Billy Wagner late last season, the Mets were without a bonafide closer to close out their games, and in some cases, cost them some wins. There were other options out there for them to pursue but Rodriguez was their best choice and now they (pretty much) have him.
In my opinion, the Mets probably bluffed their way into signing Rodriguez by making offers to other potential players, thereby forcing K-Rod's hand into discussing his contract. That's a pretty bold on the Mets' part but in the end, it worked.
K-Rod's statistics are rather good. Just last season, he saved 62 games out of 69 opportunities, which is almost 90% of the games. He had 68.1 IP, 54 H, 17 ER, 34 BB, 77 K with an ERA 2.24. For all you fantasy baseball people out there, that's a WHIP of 1.29 (career WHIP is 1.11), which is still pretty good.
All in all, he's a good player and his arrival couldn't have come at a better time!
