Obviously, totally dominant. The only small red flag is that much of his value comes from a low HR/9 rate, which is the most likely to increase in the transition to MLB. Here's Matsuzaka for comparison:
Matsuzaka's career numbers in MLB are 8.21 K/9, 4.35 BB/9 and 0.93 HR/9. Overall, his K/9 is 89% of his NPPL total, his BB/9 is 189% and his HR/9 is 169% for an overall FIP of 4.26. Which incidentally in the AL East is reasonably decent.
If we project those ratios to Darvish's numbers, it comes to a 8.15 K/9, 3.97 BB/9, and a 0.65 HR/9, which totals to a 2.97 FIP. So if Darvish has an equal transition to the AL East as Matsuzaka (which I think we would all agree has not been the easiest transition) then he's still an ace-quality pitcher. The two biggest (related) questions that I have in that projection are 1) whether Darvish would have as much difficulty with the nibbling / control that Matsuzaka has had, and 2) whether Darvish really could maintain a 0.65 HR/9 in MLB - which is to say, are his spectacular HR/9 stats from NPPL really about the dearth in NPPL sluggers or is he especially effective in reducing HRs. Darvish is also a year younger than Matsuzaka was when he was posted.
Those numbers IMO make a pretty good case for an aggressive pursuit of Darvish, despite the not so great results from the Matsuzaka posting.
Edited by PrometheusWakefield, 27 October 2011 - 03:31 PM.