It's better to be safe than sorry with Joba. If they feel the need to limit his innings then I really don't have an issue with it. I don't know a ton about pitchers and arm problems, but I think I've read a study about how a young pitcher should only increase his workload by thirty innings a year.
Jacko, I have a question about something that was discussed earlier in the year. Is Phil Hughes going to reach his innings plateau (I have no idea what it was, and I can't find it anywhere)?