In the 2006 film Talladega Nights, actor Will Ferrell’s character, Ricky Bobby, declares, “America is all about speed. Hot, nasty, badass speed.”
Mr. Bobby is on the right track in this thinking and it also applies to professional football, to an extent. Several other in-game factors affect a player’s speed such as agility, explosion, and elusiveness.
The 2020 Minnesota Vikings have about a dozen players on their roster who have below-4.5 speed (using 40-yard dash as the metric). Not all of them will make the team’s final depth chart this year, but this will be hashed out in the next two months.