Center back Clarence Goodson, who was expected to start in the U.S. national team’s friendly against Mexico on Wednesday, was scratched from the roster because of a hamstring injury suffered playing in a Danish league match Sunday.

It’s the third personnel setback for new coach Juergen Klinsmann since announcing his selections for the match at Philadelphia’s Lincoln Financial Field. Right back Timmy Chandler was allowed to remain with his German club in order to solidify his starting role and midfielder Maurice Edu injured a calf with Rangers over the weekend.

FC Dallas’s Zach Loyd and the Columbus Crew’s Robbie Rogers were added to the roster. Because of the short notice, Goodson’s slot will not be filled and Klinsmann will have 21 players from which to choose his 18-man game-day roster.

With Goodson (W.T. Woodson High School, University of Maryland) unavilable, Carlos Bocanegra and Tim Ream are the top choices in central defense, with Heath Pearce or Edgar Castillo starting on the left — a position that Bocanegra might’ve occupied had Goodson been available. Steve Cherundolo is the first choice at right back, with Loyd in reserve.