Nutter joined Bloomberg Friday for some community service in the Bronx, but he had to wear a Yankees jersey while doing it.
Bloomberg and Nutter made a wager that said the loser had to come to the winner's city to do a community service project, while wearing the jersey of the winning team.
So they helped paint walls in a hallway at a junior high school in the Bronx. Nutter wore no. 55 - honoring World Series Most Valuable Player Hideki Matsui.
Bloomberg wore no. 27, which marks the Yankees' 27th World Series win.
Nutter said he will still help to paint a mural with the Philadelphia Mural Arts Program.