Viral Ad of the Day: Yankees fan Alec Baldwin decks Red Sox fan John Krasinski hard in the latest satisfying installment of New Era's "Rivals Are Forever" marketing campaign.

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Earlier: The Trash Talking Begins.

Marketing Campaign of the Day: New Era launched a new ad campaign today, which features John Krasinski as a die-hard Red Sox fan engaging in some exponentially trashier trash talk with loyal Yankees supporter Alec Baldwin.

Meanwhile, the Red Sox snapped a six-game losing streak