Every season, Major League Baseball makes mistakes when assembling its rosters for the All-Star Game. In the last 10 years, actually, there have been plenty of blatant snubs on both the AL and NL sides.
So long as the selection process doesn't change, we'll always see deserving individuals left off.
MLB fans—many of whom are biased and/or ill-informed—vote on the starting position players, and they're allowed to do so dozens of times from multiple accounts. We have seen Derek Jeter, Dan Uggla and countless others elevated to All-Star status in years when their first halves weren't exceptional.
Another rule requires all 30 teams to have at least one representative at the Midsummer Classic. That leaves fewer spots for the players whose accomplishments merit inclusion.
This article lists the biggest snubs from 2004-2013, ranking 10 overly-qualified guys based on their superiority to All-Stars who shouldn't have made the cut.