True, it's not absolute like ops. But it can be backed up w/ various observations... Jeter, Bernie and Paul O'Neill were "great clubhouse guys," the Red Sox have a fun clubhouse," etc., etc., etc.... Thus an opinion can be supported to some extent. If you want to give it a value, perhaps 5-10% of winning a title is based on "chemistry." Sometimes talent and luck can override this though. See the 72-74 A's for more.. The problem with saying chemistry is the cause of winning rather than the result is that certain players are at one time, while their team is winning viewed as great guys and then suddenly they aren't when the team struggles. Case in point: Manny Ramirez. He's part of the Red Sox who had such "great chemistry" in 2004, yet is seen as a cancer now. AJ was seen as a cancer in S.F., yet he's such a great guy in the White Sox clubhouse now. What about crazy Carl? Did these guys suddenly become model citezens, or is it just easier to get along when you're winning? I think it's more of the later than the former.