I would probably start him as the #3 hitter to give him the most opportunities to drive in runs. If our young players can prove to get on base more, then you can consider the #4 or 5 spot. It also depends on Morales and Montero, imo.
Injury aside, Morse has been really good for the past couple of years now and really started coming along 3 years ago. He is our best hitter in terms of having a balance of both power and average.