I like him too, but it's going to come down to offense. Dontrelle is pitching with a ton of confidence right now. He's obviously not going to go 25-0 and he's going to lose at some point. I want to bet against him when he gets overconfident and starts thinking he can get away with balls over the plate. I just don't think this is the spot he loses tonight. Series is split 1-1, he's at home, and he's been preceeded by good outings from Clemens, Burnett etc. He'll continue the trend of a well-pitched series.
Astros offense is not very good, and the Marlins hit their first HR last night in over a week. Law of averages says they may hit another 1 or 2 tonight. Plus Dontrelle is hitting in the 9 spot for an extra offensive boost. He also pinched hit last night. I think Oswalt will pitch well, but I see the Marlins just getting 1 or 2 more. Astros +1.5 might be a good bet? Best of luck whatever you decide.