John Krasinski is a Red Sox fan; Alec Baldwin is a Yankees fan. Bringing the two together to talk baseball means trouble.

In a commercial for New Era, the actors jab over their respective teams.

"Quick question, are you a Phillies fan now, since you guys couldn't get Cliff Lee and he went to Philadelphia for less money?" Krasinski begins, referencing Lee's decision to turn down a huge salary offer from the Yankees.

"This is not a rivalry," Baldwin says of the Boston and New York teams, "just like fire doesn't have a rivalry with kindling, lawnmowers don't have a rivalry with grass." Watch It!