Regarding Matsuzakas use, BP has a nifty pitcher abuse system.
Matsuzaka ranks 2nd in baseball in PAP (pitcher abuse points) behind Zambrano.
Zambrano at 113,010 Matsuzaka at 98,506 and then Halladay at 80,011 at which point the numbers drop off the table. For note a 0 PAP points are assigned for a start at 100 or fewer pitches and PAP = (PC-100)^3. For example a 120 outing is +8000 PAP, and as you can see Dicek is up near 100,000 so he has accumulated a ton of these starts.
At the beginning of the year I loved the idea that this guy was like superhuman compared to American pitchers and I'd always say to myself with a normal pitcher that 110 is the about the limit, but with DiceK I'd say let him get to 110 and see if he has another inning or two in him.
Already this season in two less IP he has thrown ~350 more pitches than he did in Japan. He does have experience in the 3500-4000 pitch range but there is going to be a dramatic difference between 06 and 07 for him and his command has become shotty and he is leaving fastballs over the plate.
I don't know what we can do at this point, he is human, comparitively to American pitchers I have a feeling he is going to always be among the more durable pitchers, but in his first season in the majors, eh, I think in hindsight we have made some mistakes for this year. It's really an unfortunate problem to have, Beckett/DiceK looked to be a filthy 1-2 in the playoffs and I'm not sure what a couple days of rest will do at this point. Best thing we can do is keep him on 5-6 days rest always for the remainder. He is a gamer, come playoff time I think he can put any regular season stuff by him and focus pitch by pitch, as of now DiceK is still my #2 SP.