Good article from WEEI.com.
Here's a paragraph and link to read the whole article:
"Obviously it's crossed my mind. But it's not something that's really set in for me yet. I feel like I've got one more year here and we'll go from there," Lester said of his potential free agency. "I'm sure there will be some form of communication [with the Sox about a new contract], I would imagine probably in spring training, hopefully in spring training and hopefully during the season sometime if not in spring training. Obviously Boston's my home. This is all I've known. This is all I've become accustomed to, and all I want to know. My family enjoys it up there. I enjoy playing up there. There's a lot of factors in it. At the same time, kind of like Jacoby, there's a business side of everything and you've got to look at it that way. Same thing with the Red Sox. ... Sometimes you have to part ways. Hopefully that's not the case when it comes down to us here in the future."