After reading Hero's post, I think we will be treated as H2H and the stats from the first 11 innings count toward the original week. No pitcher gets a W or S but otherwise normal game. The stats for the 7/9 completion will not count toward either week.

A side thought, if Was and Hou were to trade before then, which I doubt they will, I wonder if a player could play for both teams in the same game. I also wonder if it would matter if they had started the game and were still in it or if they had started the game and been removed.