At the 2006 Winter Olympics in Turin, Italy, Davis became the first black athlete to win a gold medal in an individual sport at the Olympic Winter Games, winning the speedskating 1000 meter event. He also won a silver medal in the 1500 meter event. At the 2010 Winter Olympics in Vancouver, Canada, he duplicated the feat, becoming the first man to successfully defend the 1000 meter gold medal, and repeating as 1500 meter silver medalist.

Davis won the all-around World Allround Championships in both 2005 and 2006, after winning the silver medal in 2004. In 2009 he won the World Sprint Championships in Moscow, the site of his first World Allround Championship victory. By winning he became the second male skater to have won both the Sprint and Allround in their career, after Eric Heiden. He has won six World Single Distance Championships titles, three at 1500 meters (in 2004, 2007 and 2009) and three at 1000 meters (in 2007, 2008 and 2011), and he led the United States to its first and only World Championship gold medal in the Team Pursuit event in 2011. He has won ten career Overall World Cup titles, six at 1000 meters (in 2006, 2008–10, 2012, 2014) and four at 1500 meters (2008–2011). Davis also earned the title of Grand World Cup Champion for the 2013–14 season, earning the most points across all distances. His 58 career individual victories on the ISU Speed Skating World Cup circuit (through March 2014) place him second all-time among men.

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