The Best Upset ESPY Award was conferred once each in 2004 and 2005 annually from 2007 until 2017 and again in 2019 to the team in a regular season or playoff game or series contested professionally under the auspices of one of the four major North American leagues or collegiately under the auspices of the National Collegiate Athletic Association adjudged to have completed the best, most significant, or most impressive upset in a given calendar year.
In 2004, award selections were made by fans voting over the Internet or at relevant sporting events from among choices determined by a panel of sportswriters and broadcasters, ESPN personalities, and retired sportspersons, whilst since 2005 voting has been undertaken by fans exclusively over the Internet from among choices determined by the ESPN Select Nominating Committee. The ESPY Awards ceremony is conducted in July and awards conferred reflect performance and achievement over the twelve months previous to presentation.
There was no award presented in 2018, 2020 or 2021; however, an award was presented in 2019.
Defeated the top 3 seeds in the Western Conference to reach the 2012 Stanley Cup Finals as a #8 seed (Los Angeles later defeated the New Jersey Devils in six games to win the Stanley Cup)
Morgan William hit a pull-up jumper as time expired in overtime to give the Bulldogs a 66–64 win over UConn in the national semifinals, ending the Huskies' 111-game winning streak, the longest such streak by any men's or women's team in college basketball history.