MINNEAPOLIS — General Mills, Inc. on June 14 announced that special-edition commemorative packages of Wheaties will be issued to honor the San Antonio Spurs, winners of the National Basketball Association championship. The Spurs completed a four-game sweep of the Cleveland Cavaliers on Thursday. The Wheaties package, which will be available nationally beginning in the next few weeks, will feature Spurs star Tim Duncan who has won four N.B.A. championships. The back panel will feature a Spurs team photo. The package will be the fourth featuring Mr. Duncan and the third featuring the Spurs.