I seem to remember people saying that he likely would have normal splits but not be a terrible hitter against LHP. I think Lou trusts Kosuke more than the other Cubs left-handers against LHP. You can see it by who he pinch-hits for more often in that situation. But Kosuke is going to have a hard time starting against many LHP because the Cubs have three OF's who all normally hit left-handers very, very well. true. i guess my biggest problem is that you're not going to have good success against LHP when your manager plays you very sparingly against them. to make it worse, kosuke tends to bat most frequently against LOOGYs in the middle innings before lou wants to make a change; most SP have less severe splits while a lot of the guys that kosuke ends up facing are pitchers who are in the major leagues simply due to their proficiency at getting LH batters out. so he ends up facing only difficult major league LHP, so of course he looks awful against them.