Michael Conroy/Associated Press
The 40-yard dash is far and away the most popular drill at each combine, although the results are one minute fraction of what teams consider when looking at a prospect.
Speed alone does not translate to success at the pro level, but it certainly helps when combined with other traits.
The following prospects have found varying levels of success after jaw-dropping numbers in the sprint.
1. Chris Johnson, RB, 2008 (4.24 seconds)
The most successful of the top dashers on the list, Chris Johnson's speed combined with his elite vision and overall athleticism have made him one of the NFL's elite backs for a number of years.
Johnson has eclipsed more than 1,000 yards rushing in all six years as a pro and has scored 50 touchdowns on the ground, with his longest scoring run coming on a 94-yard score in 2012.
2. Marquise Goodwin, WR, 2013 (4.27 seconds)
While small in stature, Marquise Goodwin's elite speed was fully on display at the 2013 combine, which he put to somewhat good use as a rookie with the Buffalo Bills.
Goodwin caught 17 passes in 12 games as a rookie and was effective on returns after taking second place in the record books. He's also an Olympian, which further highlights his elite athleticism.
3. Jacoby Ford, WR, 2010 (4.28 seconds)
Jacoby Ford is another elite athlete with a smaller frame who has found a niche role with the Oakland Raiders. As a rookie, he recorded nearly 1,300 yards on kick returns and scored three touchdowns, but has seen limited use since.
4. DeMarcus Van Dyke, CB, 2011 (4.28 seconds)
DeMarcus Van Dyke was a third-round selection after his impressive showing at the 2011 combine, but he lasted just one year in Oakland before going on to make minimal contributions with the Pittsburgh Steelers in 2011.
5. Darrius Heyward-Bey, WR, 2009 (4.30 seconds—tied with Yamon Figurs and Tye Hill)
Darrius Heyward-Bey is yet another speedy selection the Oakland Raiders made and regretted rather quickly. His best year came in 2011 thanks to his 975 receiving yards, but fundamental issues such as concentration and drops have marred what could have been a stellar career.