Alec Baldwin has seemingly mastered the impressive skill of both taking life very, very seriously, and lampooning those who do so as well. See: his outspoken political activism, juxtaposed with his award-winning executive farce in "30 Rock."When it comes to baseball, though, the lines are a little bit blurred.A longtime Yankees fan, Baldwin stars alongside noted Red Sox fan -- and fellow NBC Thursday Night leading man -- John Krasinski in a new series of ads for hat maker New Era (see the first one here).