I settled on 34 starts because that's generally what you hope for during a full healthy season from your number one starter, but what I'm going for is an idea of what an entire season of Yu Darvish in Major League Baseball looks like.
Two words: Holy crap.
20-10, 224.0 IP, 3.58 ERA, 270 Ks, 99 BBs, 14 HR, .208 BA, 1.21 WHIP
2.98 FIP, 3.29 xFIP, .291 BABIP, 10.85 K/9, 3.98 BB/9, 2.73 K/BB, 0.57 HR/9, 47.6 GB%, 12.2 IFFB%, 8.1 HR/FB%
6.6 fWAR, 5.4 bWAR
Like I said, holy crap, right? The number that jumps out though is the 270 strikeouts. To put that in perspective, it would have led the American League every season since 2000, when Pedro Martinez was busy being the greatest pitcher alive. To put it in further perspective, only four AL pitchers have struck out at least 270 batters in a single season in the DH era (40 years).
(Steve Carlton, JR Richard, Dwight Gooden, Mario Soto, Mike Scott, John Smoltz, and Curt Schilling are the National Leaguers who have done it in that time, with some overlap from the above list, but the NL barely counts since lolpitchershitting.)
Of course, Yu isn't on pace for 270 strikeouts this year. Assuming he continues mowing guys down at the rate he has this season (13.5 K/9) and pitches about 6.2 innings a start, which is where he is right now, that number is looking closer to 330. That's in roughly 220 innings, by the way. I marked him down to 33 starts, just to be a little conservative.
One more time, all together: Holy. Crap.