Ken Rosenthal, Fox Sports, 11:09 AM wrote: The Mets are offering Johan Santana by far the highest salary ever for a pitcher under a multiyear contract. However, the structure of the deal remains an issue only hours away from today's 5 p.m. ET deadline to strike a deal, according to major league sources. The Mets' offer is in the range of $22 million per season. The hang-up is that the Mets want the guarantee to be for five years, with vesting options that could extend the deal, sources say. Santana's agents, Peter and Ed Greenberg,, want a guarantee of six or seven years. "We've still got a ways to go, but we're in a lot better position than we were a few days ago," said a source close to the negotiations. There are several ways the two sides could bridge the remaining gap. The Mets could increase their financial offer by giving Santana a signing bonus on top of his $13.25 million salary for next season. The two sides also could adjust the innings threshold on vesting options to make them more easily attainable for Santana. In the end, the Mets simply might guarantee a sixth year. "22.5 times six will get it done," one prominent agent predicted. The total value of such a package would be $135 million.