The Boston Red Sox have agreed to an eight-year extension with rookie infielder Kristian Campbell, the team announced Wednesday. The deal includes two club options and is worth a guaranteed $60 million.

More details have been reported about the Kristian Campbell contract extension signed by the second baseman with the Boston Red Sox. As reported Thursday by Jon Heyman, Campbell's eight-year deal comes with eight different salaries, plus a $2 million signing bonus, for a maximum value of $60M.

The rookie made the opening day roster out of Spring Training and inked an 8-year, $60 million contract just a few days into the season. The deal could be worth as much as $100 million over 10 years if the Red Sox opt to utilize the two club options at their disposal.