While Hamilton's 22 home runs and 62 RBI still make him the favorite, Granderson's 20 home runs and 39 RBI are also quite good.
Granderson's case for the MVP award is backed by his consistency this season. In March/April, he launched eight home runs and hit .262. In May, he hit eight home runs with an average of .257. We're currently half-way through the month of June, and Granderson has four home runs with an average of .250.
His consistency helped to keep the Yankee offense somewhat afloat during it's rough stretches in April and May and, without his production, the Yankees may not be as well off as they are right now.
His 46 runs scored are good enough for fourth in all of baseball as well.