Raise your hand if you had Robinson Cano joining the Mariners and Jason Vargas getting a four-year deal this offseason. You might have a better chance of correctly filling out an NCAA tournament bracket.
Cano's and Vargas' contracts have little in common except that they're both longer than you probably would have expected. Cano will be 40 at the end of his deal, while Vargas, a No. 5 starter, got a deal befitting a No. 3 in terms of its length. And that seems to be a recurring theme among this offseason's signings: teams compromising on extra years, usually in exchange for less salary.
Several such contracts are on this list, my ranking of the 12 most lucrative contracts signed this offseason to date.