Just one according to the rotation schedule...unless they put him on a 4-day rotation and have him pitch the final game against the Indians. I don't see that happening.
Detroit Tigers 2011 Schedule - Tigers Home and Away - ESPN
Denny Mclain finished with a record of 31-6 and an ERA of 1.96, which is comparable to Verlander's 2.29 when you adjust for the Designated Hitter.
It's also probably comparable if you moved them back to a 4 man rotation.
I wonder what the most wins in a 5 man rotation is ?