I had posted this in the lineup cards thread, but don't mind reposting here.
Maury Wills started 1969 with the Montreal Expos, but was soon traded back to the Dodgers. Upon returning with the Dodgers to Montreal to play the Expos, Wills (not known as a slugger) hit his one and only career grand slam on August 16, 1969. Although undated, this is the only date this line-up ever appeared in a road game.
Wills grand slam line-up card 1969 reduced.jpg