I have predicted things about him before, but that was with the assumption that he would have a bullpen. Put it this way, with the sox middle relief and closers role being about as porous as they come, do you see the sox starters cracking 16, 17, 18 wins?
Now as far as comparing Nomo to him, remember the differences in their game. Matsuzaka has multiple plus pitches, but Nomo had a windup that was extremely difficult to figure out and he had a splitter that nobody had ever seen before. His splitty was so good that it took 2 yrs for people to even start hitting it and figuring it out. Eventually, players learned that he couldnt locate it well and sat on the heat. That led to his destruction and his lack of confidence in finding the plate.
Matsuzaka does not have "the pitch" that nobody has seen before. In case you missed it, he has never thrown a gyroball in a game. The supposed "gyro" on youtube is actually a schutto (sp?) which is a back up slider that nearly all solid japanese pitchers either possess or have tinkered with. Consider it a slower screwball, which is still used in today's game. This is why I dont think Matsuzaka will have the type of initial success that Nomo had. But at the same time, he wont be "figured out" like Nomo was. He has more pitches and better control of them than Nomo had, so he will be good, but he wont be as baffling as Nomo was early on. I actually think that he will be the reverse of Nomo. He's a guy who will benefit from learning the league rather than the other way around and by yr 2 or 3, I expect him to be pretty damn good.
This yr, I predicted something in the 3.8-4.3 range, and I am sticking by that. He'll get near 200IP but I dont see the sox pushing this kid until they have to as far as IP, so he should be in the 180-200 range assuming he stays healthy. He will likely K something like 7-9 per 9IP depending on how challenging the hitters are to him. I feel that his K rate will rise if he has trouble because he will be fearful of players putting the ball in play, while I think his K rate will drop if he has success early on. If you look at his numbers, his K rate has declined with each yr he has dropped his ERA. He has started to pitch to contact once he learned the league and started to dominate. This allowed him to stay healthy and pitch longer into games. His BB rate will rise as he will be in the ALE and playing half his games against very patient teams will put a toll on him. It wont go through the roof, but it will be high early on.
Either way, even if the best of my predictions pan out, I see him in the 12-15 range of wins. Why? Because the lineup will be good enough to give the sox leads, but the pen is so bad that they will blow a lot of them. Mix that with Matsu's cautious handling at least for this yr and you have the potential to rob him of anywhere from 5-8 wins depending on how poorly the closer performs. At the same time, the sox MR isnt exactly stout with inherited runners, which could turn solid Matsu performances into losses. So at least this yr, I am predicting him to have anywhere from 7-10 losses, 3 or 4 of them not being his fault whatsoever.
So overall. 12-15W 7-10L 3.8-4.3ERA 180-200IP 150-180K 50-70BB
Yrs 2 and beyond will likely be better once he learns the league and starts to use his entire arsenal along with his knowledge of the hitters.