Not complaining about Marquis. Just holding my breath, that's all. Yes, he's shown the ability to last an entire season. He's also shown the ability to royally suck. I think that sums up Jason Marquis. So far, he has shown indications of the former, and the fact that it appears that it was a mechanical change that caused this change is also hopeful. At the same time, it is acknowledged that he when he starts to struggle, it is hard for him to bounce back from that. The Cubs do have a few advantages for Marquis as long as he keeps up his ground ball ratio. The high grass, the good range of most of the Cubs infield, and what seems to be a quick DP combo so far should be able to get him out of many jams. The big question is if he can keep up that ground ball ratio-some years he's been near the top in the league in that, and some years he hasn't been. Which one he turns out to be this year will be a key indicator in his success, along with continuing to throw strikes and keeping his walk rate at least as low as it was his 3 years with the Cardinals. Probably true. The Cubs also have another advantage: assuming Guzman earns the 5th spot, they will have Prior, Miller, and Cotts waiting to bump Marquis out of the rotation if he starts getting plastered.