Jon Lester threw a no-hitter.

Lester is the rightful story. Lost in the shuffle, however (quoth the AP):

Catcher Jason Varitek, who has been behind the plate for a record four no-hitters [...] also caught [Clay] Buchholz's no-hitter, along with gems by Hideo Nomo and Derek Lowe.

I don't know if there's a way to measure the ability to call a game -- Catcher's ERA is unreliable at best -- but I do believe it is a skill. Four no hitters by four different pitchers, as well as the consistent success of the Sox' pitching staff, leads me to believe Jason Varitek is the best at it.

I still hate the Red Sox.