Numbers are a funny thing. They never lie, provided the ones you're using are accurate and calculated correctly. But they can definitely not tell the whole truth, when not put in the proper context. Here are two examples.
Incontrovertible Fact #1: Albert Pujols had by far the worst season of his career this year. In fact, the past two years have been undoubtedly the two statistically worst of his career.
Incontrovertible Fact #2: Albert Pujols had a season this year - and an average season over the past two years - that, by using fairly common stats, was matched by very few hitters.