Sykes, I could easily give you 3 or more very good seasons by Dusty Baker. I never said Mike Marshall can't have a good season. Just about anyone in the '80's game can have a good season, especially if used enough. But after playing 40+ seasons, I can assure you that Mike Marshall rarely gets drafted and many times rarely even gets picked up during the season as a FA. Why is that? Because he's overpriced for the output that he will give year in and year out on a consistent basis.
Also consider that you ALWAYS play in the Murph. That's just about the only stadium that Marshall is servicable because of his BP HR's. If you're in just about any other stadium (save Kingdome) and you may know what I mean. His OBP is just awful. But again, that's just my opinion.