Archived MLB.TV feeds are free to watch if you register with MLB.com (also free), and yes, he was absolutely as filthy as everyone was making him out to be. Len was almost beside himself on the last strikeout; "Oh, he did it again! The slider!"
Hell yeah. Gotta hear those radio calls. There should be more than one gem from today. Ask and ye shall receive. http://home.comcast.net/~bcvm22/cubs/5302008.mp3
It's just a translation idiom. The "oh" sound in Japanese can be written in English as "oh", "ou" or "o" depending often simply on whomever's doing the writing; the Japanese catcher for the Mariners has his name on official materials and his jersey as "Johjima" despite the fact that when people were discussing him prior to his signing by Seattle, "Joujima" and "Jojima" were both used. I have enough faith in the Cubs' front office that they consulted with Kosuke upon signing him as to how he wanted his name spelled exactly in official materials.