As a pitcher, his performance history shows no batting stats, though he does have pitching stats.

If I draft him, can I expect him to give me his actual batting numbers,.285 .361 .564?

Yes, but I'm not sure that you are going to get a lot of AB's for him.

I want to use him as a starter, I figure he can give me about 9-10 starts. He has a 5.17 IP/G.

I'm trying to put together a team that can use starters as DH, I'm a little short on starter innings so I thought he could fit in.
I have tried that a few times before, didn't work all that well. My conclusion after each season was to think "Let hitters hit and pitchers pitch."

But I have another idea to test so I'm working on that.