'Chicago vs. Chicago'

Last year, New Era released some hilarious commercials about the Red Sox/Yankees rivalry, which featured Alec Baldwin as a Yankees fan, and John Krasinski as a Red Sox fan.

New Era is apparently doing similar commercials this year for the Cubs/White Sox rivalry, featuring Nick Offerman (best known as Ron Swanson in Parks and Recreation) as a Cubs fan, and Craig Robinson (best known as Darryl in The Office) as a White Sox fan.

Check out 'Chicago vs. Chicago: Round 1':