I honestly think he'd be as a reliever. The guy is typically good for 2-4 innings per game, and then blows up in one inning. As a reliever, he might be less likely to reach the point where he blows up, and if/when he does struggle, the manager should be more willing, and more prepared to have a replacement ready. Then again, since nearly all relievers are failed starters, that's not much of a stretch. And like most of them, he'd probably be inconsistent, if not from appearance to appearance, then from year to year. I have no problem with Marquis as a long relief guy.