Diamondbacks, Chase and the Maricopa County Stadium District Unveil New Ballpark Name.

Bank One (NYSE:JPM):

WHO:    Arizona Diamondbacks President Rich Dozer, Arizona President
        of Bank One Ben Campbell, head of Chase Retail Banking in the
        Southwest Joe Gionta and Maricopa County representatives...

WHAT:   ...will announce the new name of Bank One Ballpark.
        Diamondbacks players will unveil the new ballpark logo.

        The ballpark name change is a result of the 2004 merger
        between JPMorgan Chase and Bank One.

        Parking will be available in the Bank One Ballpark Garage.
        Media should enter through the Administrative Lobby. Media
        must have proper ballpark credentials to attend the event. For
        Diamondbacks credentials please fax your request to
        602.462.6527.

WHEN:   Friday, Sept. 23
        2 p.m.

WHERE:  Bank One Ballpark
        Behind the Diamondbacks dugout

                            -DIAMONDBACKS-