When you consistently push the envelope with pitcher's outings, you're begging for injury. It's no coincidence that Prior and Wood were ridden really hard down through '03, and both have had injury problems since. There's no cut and dry point where you say that "this is too many pitches for anyone". Sometimes a guy will throw 120 pitches and not throw many high stress pitches, and still have proper mechanics. As a guideline, when you get upwards of 120, there are few pitchers who maintain their form. People with more background than me have noticed Carlos's mechanics breaking down at high pitch counts before, and considering his age and how long we want to have him around, it makes little sense pushing Carlos to that level of risk as consistently as Dusty does.