Picking up Lester's option could be prelude to another move for Sox
Nationals, Jon Lester In Talks - MLB Trade Rumors
Cubs sign free-agent ace Jon Lester
On One Pitch, a Scintillating Outing Turns Sour for Tanaka - The New York Times
Boston Red Sox: Breaking Down the Trade of Jon Lester to the Oakland Athletics, News, Scores, Highlights, Stats, and Rumors
With Jon Lester signing, Cubs shake up the baseball world – Hartford Courant
Cardinals trade for Jon Lester, J.A. Happ
Recapping Jon Lester's 9-year MLB career: From lymphoma to Red Sox trade, to Cubs deal
With Flurry Of Trades, Red Sox 'Got Rid Of A Lot Of Working Parts
Jon Lester - Wikipedia
Cardinals trade for Jon Lester, J.A. Happ
Jon Lester, Yoenis Cespedes part of A's-Red Sox trade
We've Seen the Red Sox-Jon Lester Negotiations Before - When Boston Lost Roger Clemens
Former Red Sox great Jon Lester is calling it a career