The schedule according to ESPN (
http://espn.go.com/mlb/team/schedule...detroit-tigers) has Verlander starting 9/13 and 9/18 (Chicago and Oakland). Logical progression would have him pitching against the wOe's on 9/24 with the other four starters ending the season giving him maximum rest for the playoffs while still keeping him sharp.
If he gets the win against the ChiSox (the only winning team he'd face), I'd bet that he gets to 25... and further bet that I'm in the stands on 9/24.