Robinson Cano is 29 years old, the best player on baseball's best team, and a bit more than a year away from free agency. He's about to become the kind of rich that will allow him to build a nature preserve and hunt the deadliest game of all, if he so desires.

How rich? Cano is much better and much hardier than Jose Reyes, who signed a six-year, $106 million contract this past winter, and he is represented by Scott Boras, the hardest agent in the game. A $150 million deal would surprise no one.

The...