Boston slugger David Ortiz and Philadelphia's Ryan Howard -- the Major League leader in home runs -- are among the six players tentatively scheduled to compete in the Century 21 Home Run Derby on ESPN. Also expected to participate are David Wright of the New York Mets, Jermaine Dye of the Chicago White Sox, Toronto's Troy Glaus and Carlos Lee of Milwaukee, with two other spots for the July 10 competition at PNC Park in Pittsburgh to be determined.