Gary A. Vasquez-USA TODAY Sports
Silva handed Overeem his first UFC loss at UFC 156.
Betting Odds: +325
Over the past 12 months, several fighters returned $3.25 on a $1.00 bet by picking up unforeseen wins.
Perhaps most notably, Antonio Silva welcomed Alistair Overeem back from suspension in February by knocking the former Strikeforce champion out in the third round. The win earned "Bigfoot" a title shot and rematch with Cain Velasquez, who again made quick work of the Brazilian in May.
Similarly, Robbie Lawler recently slowed the rise of Canadian welterweight Rory McDonald. With his decision win over the Tristar Gym fighter Lawler earned himself a fight with Johny Hendricks for the now-vacant 170-pound championship.
Additionally, outside the Octagon, Daniel Straus and Steve Carl picked up respective upset wins over Pat Curran and Josh Burkman to earn their Bellator MMA and World Series of Fighting belts.
Here is the full list of fights tied for the 10th biggest upset of 2013:
- Antonio Silva vs. Alistair Overeem
- Bobby Green vs. Jacob Volkmann
- Daniel Straus vs. Pat Curran
- Doug Marshall vs. Andreas Spang
- Robbie Lawler vs. Rory MacDonald
Siala-Mou Siliga vs. Dan Charles
- Steve Carl vs. Josh Burkman