It's worrisome, yes. Wood hasn't been the picture of health, but I think he will still be the starter opening day.
Especially for a pitcher, I stay away from injury risks.
In theory, that would be a good idea. But was RJ an injury risk in 2003? He would have hurt you if you had drafted him then, after very few problems before hand. In that vein, is he any less of an injury risk now, considering he has no cartiledge in his knee?
I assume you didn't draft Schmidt or Santana then last year. And you might have drafted someone like Halladay.
My point is that while certain people are more injury riddled than others, players will get injured even if they haven't been injured in the past. And those pitchers who have spent some time on the DL, drop lower than they should because too many people are afraid of them going back onto the DL.
Last year, because I threw caution to the wind, and picked the best available pitchers, I ended up with Schmidt, RJ, and Santana on one staff.
By all means, be weary of those who can't seem to stay of the DL, but don't let them drop too far, and don't be suprised if you draft a typically "healthy" pitcher and they missed significant time.