New info on lineup and defense: http://markbowman.mlblogs.com/archives/2010/04/prado_starting_at_third_in_chi.html
Basically Prado moving to 3rd base, move Infante to 2nd, Diaz taking over left field from Nate McClouth, whose sitting this one out by the looks of it. Here's the lineup:
Cabrera
Prado
Escobar
Glaus
Diaz
Infante
Heyward
Ross
Hudson