Like most sports, MMA is full of unpredictability.
In 2013, many big upsets shook up the UFC and MMA landscapes.
Whether it was Emanuel Newton shocking Muhammed Lawal under the Bellator MMA banner or Josh Burkman putting Jon Fitch to sleep with World Series of Fighting, nearly every matchup over the past 12 months kept fans on the edge of their seats.
Based strictly on betting odds, here were the 10 biggest upsets in major MMA promotions during 2013.