I'm surprised no one has said it, but Mauricio Wright is starting for AEK Athens in the Champion's league. Can any other ex-MLS players claim that?
Frankie Hejduk started several CL games for Leverkusen, and was man of the match in a couple of them ...
Former Wizard Refik Sabanadzovic won the European Cup with Red Star Belgrade in 1991 before coming to MLS.