Theo Epstein will be formally introduced as the new President of Baseball Operations for the Chicago Cubs on Tuesday.

In Sunday’s Boston Globe, Epstein took out a full-page ad thanking the organization and Red Sox fans for a decade of memories; it’s reproduced in Pete Abraham’s “Extra Bases” online column. It says, in part:

Thank you to the Fenway faithful. You’ve been the driving force behind two World Championships, six playoff appearances, more than 700 consecutive sell-outs and some of the most dramatic moments in sports.

And most of all, thank you for supporting something much more important than any game: investment in the lives of thousands of Greater Boston kids. Your generosity has enabled the Foundation To Be Named Later to provide $5 million in grants to young people in need, fund 19 college scholarships, and host 3,200 children to Red Sox and Celtics games.

Classy move on Epstein’s part as he joins his new team, but remains a fan of his old one; it ends with the words “Go Sox”. He might want to be careful saying those words in his new city, though, where “Sox” has another meaning.