D.C. United will announce today details of a major exhibition between the MLS club and English League champion Chelsea in late July at FedEx Field in Landover.

RFK Stadium, United's home since 1996, will not be used because of concerns about the field, which is uneven in spots where temporary grass covers the baseball infield.

Chelsea, which last month won its first English title in 50 years and boasts one of the most impressive rosters in international soccer, also will play two games against Italian power AC Milan at other U.S. sites, probably Gillette Stadium in Foxboro, Mass, and Giants Stadium in East Rutherford, N.J.

Milan's other match will be against an MLS team, believed to be the Chicago Fire.

United's regularly scheduled game during Chelsea's visit -- July 28 against Real Salt Lake -- will be moved. ESPN2, which had planned to show that MLS match, might carry the United-Chelsea game instead.

Adu Makes Early List

United has been notified that teenager Freddy Adu is on a preliminary list for U.S. national team training camp, which will open around June 26 in Portland, Ore., in preparation for the Gold Cup. Adu, currently with the under-20 squad at the world youth championship in the Netherlands, never has played for the senior national team.

A final roster won't be determined for quite some time and many factors will contribute to the decision, officials cautioned. . . .

United rookie Clyde Simms, who accompanied the U.S. squad to both of the recent World Cup qualifiers, likely will make the roster for the 12-nation Gold Cup, which will be held July 6-24 and will involve regional powers such as Mexico and Costa Rica as well as guest teams South Africa and Colombia.

United's Freddy Adu is on a preliminary list for U.S. national team training camp.