According to MLB Trade Rumors, Gio Gonzalez's new contract extension with the Nationals includes a vesting option for 2018. Gonzalez signed a five-year, $42 million contract extension with the Nationals on Sunday which includes $12 million options for 2017 and 2018. If the club option for 2017 is picked up and he throws 180 in the same season, his option for 2018 will kick in automatically.