The deal will pay the 26-year-old right-hander - who will make his Red Sox debut tomorrow night in Philadelphia - $20 million in 2016 and 2017 and $21 million in 2018 and 2019.
Porcello, The Player's Tribune:
In a short time, I have become very comfortable with the organization and my teammates. At our winter fan event in January, I got to spend time with the veteran guys on the team like Mike Napoli, David Ortiz and Dustin Pedroia. The main topic of conversation was winning a World Series in 2015. What struck me was that it wasn't discussed like it was a goal, but rather an expectation. I continued to see this overwhelming commitment from my teammates, my manager, my coaches, the front office and ownership. I knew immediately I wanted to work in a place with that mentality.