Player's generally want the option to opt out of a contract to pursue either a bigger, longer contract or higher AAV. Correa's value is at its peak because of his age (28) and position (SS). In 4 or 5 years he will be "old" by MLB standards and ready for a positions change, both of which mean less $$$. He could have played out his contract in MN and not cost himself anything, unless he got hurt in year 3. He would be 30 years old and inline for another big payday, lets say 7 years, $245 MM. That would equate out to 10 years, $350.3 MM including the 3 year, $105.3 signed last year. I don't think he gets that much this year competing against Judge, Bogaerts, Swanson, Turner, Verlander, deGrom, etc...