Originally Posted by Pony Boy
Bad example. The Pirates play in one of the most pitcher friendly parks in baseball. This has a huge effect on the frequency of blown leads. It is just harder to come from behind in a pitcher's park like PNC. There are lots of factors that go into a teams' win percentage when leading in the 9th other than the closer.
I would imagine the Pirates' save chances were actually much more difficult than the Yankees' save chances simply for the fact that a higher percentage of Pirates saves chances would be one run leads while a Yankees save chance is more likely to be a three run lead. The Yankees scored a lot more runs and had better starting pitching, which led to larger late inning leads. The Pirates relievers were essentially just as good at saving games as Mariano Rivera even though they were protecting smaller leads.