Stanton and the Marlins are closing in on a deal worth $325 million over 13 years -- including an opt-out window after five years, CBS Sports reports. In addition to being able to opt out at age 30, Stanton will have a full no-trade clause as well. The contract is the largest in North American sports history -- passing the $275-million contract that Alex Rodriguez received from the Yankees at age-32. The Marlins have not confirmed the deal, but it's expected to become official at some point later this week.