My initial reaction to the 2012 American League MVP announcement was a too-little-too-late advocation for Mike Trout. Extra research confirms that his snubbing ranks among the biggest of all time.
Members of the Baseball Writers' Association of America annually determine each league's most valuable player. Though they are entitled to their own criteria, this most recent result—and many others from the 20th century—can hardly be rationalized.
*All stats courtesy of Baseball-Reference.com.