First think I should mention is Halladay and Oswalt are NOT Johan Santana. I don't think anyone will disagree with me that Johan Santana is the best pitcher in baseball (probably has the best pitch in baseball as well). Halladay has injury issues while Oswalt pitches in the NL. Maybe that not fair but it is what it is....Santana is in a category of his own. So..
Is Dice-K the next Johan Santana? No he is not but he DOES have the ability to put up a few potential Cy Young seasons. He has a terrific team behind him and once he becomes more settled in, I would expect more. He has his good days and his bad days but when he starts to understand teams better then he will know how to attack them. Because of his style I don't see it being the other way around. He managed to defeat the Yankees when he knew nothing about them.
He is a smart pitcher who knows how to pitch and eventually that will catch up with him, he will have better pitch selection and learn how to set up batters. Right now he places the game in Jason Varitek's hands and Varitek (as good as he is) doesn't quite know how to handle Dice-K at this point. Everyone makes the comparison of Dice-K to Josh Beckett of 2006....that seems more appropriate than comparing Dice-K to previous Japanese pitchers. Wouldn't you know it...Josh Beckett is putting up Cy Young type numbers.
Johan Santana? Probably not but a future ace? Yes. Between Beckett and Dice-K the future and present is bright in Boston.