Roman Anthony’s complicated, groundbreaking extension with the Red Sox is official — and its value will largely be determined by how he performs over the next decade.

The Boston Red Sox and outfielder Roman Anthony agreed to an eight-year extension on Wednesday, with ESPN's Jeff Passan reporting the deal is worth $130 million.

The Boston Red Sox have signed rookie phenom Roman Anthony to an eight-year contract extension. The team announced the deal before Wednesday night's game against the Kansas City Royals.