Alec Baldwin and John Krasinski bond in baseball rivalry (VIDEO)

(CBS/AP) The Yankees and Red Sox division run deep, even through NBC's Thursday night comedy lineup.

Alec Baldwin, star on "30 Rock" is a Long Island native and a dedicated Yankees fan. John Krasinski of "The Office" comes from Newton, Mass., and is a devoted Boston Red Sox fan.

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They may be in two different TV lands on Thursday nights - Baladwin as the executive Jack Donaghy in the New York headquarters of NBC, while Krasinski plays paper salesman Jim Halpert in Scranton, Pa. - they are currently meeting in popular commercials for headwear maker New Era (watch one of them above).

In the commercial spots, the two trash-talk one another like a typical egotistical Yankee fan and an over dramatic Red Sox fan. Krasinski compares being a Yankee fan to rooting for fascism, to which Baldwin replies: "No, it's like being a huge fan of winning, which we do...relentlessly."

"We thought it would be really fun because we are such big fans of both teams," says Krasinski. "He's definitely the epitome of someone who grew up in New York. And I think I'm somewhat of the epitome of someone who grew up in Boston."

The actors first became friends while filming "It's Complicated" in 2009. The two speak highly of one another.

Krasinski says Baldwin is "one of the truer friends you can ask for in this business. Baldwin says Krasinski is going to be "one of the great romantic leading men in movies."

"There's no one I could have done this with other than John," says Baldwin. "I just love John. He encapsulates the Red Sox fan, people who are into super-religious symbolism, people who do a lot of praying. Red Sox fans are people that have to do a lot of talking to God."

The ads are currently being featured on broadcast of Red Sox-Yankee games and will continue until the end of the season. A new add will debut during Friday's game between the teams.

As the year goes on, their disagreements will mount. The 53 year old actor says "I smashed this cake one day."

"There's a gradual evolution towards how we deal with our friendship in the midst of all this," says Krasinski. "There's definitely going to be some pyrotechnics involved. There's definitely violence, too, which is luckily hilarious violence and not real violence. It escalates pretty quickly."

So far, the Yankees jumped out to a division lead while the Red Sox stumbled early on - though the Sox have since turned it around.

"He's much more excited with how the spots are going right now," says Krasinski. "I'm fine. I'm fine to take the egg on my face right now and hopefully celebrate at the end."

Baldwin is fittingly confident: "I want the Yankees to prevail and I want the Red Sox to do what the Red Sox always do."