The Cubs made the signing of starting pitcher Jason Hammel official on Friday, ESPN reports. According to CBSSports.com Baseball Insider Jon Heyman, Hammel signed a two-year deal worth $18 million on Monday. The deal includes a $10 million team option and a $2 million buyout for 2016.

Hammel posted a 8-5 record and 2.98 ERA with the Cubs last season before being traded to Oakland.