Catch up on the 2018 NFL Combine’s fastest 40-yard dash times in 40 seconds

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In physics, speed is a scalar quantity. At the NFL Combine, speed seems to correlate with the scales.

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The lighter players — running backs, wide receivers and defensive backs — tend to be the fastest in the 40-yard dash. But few things turn heads like a larger player — Hello, Shaquem Griffin! — who can put up a low time.

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So let’s check out all of the 2018 lowest times at each position — and eventually overall.

We’ll see if any of the prospects jockeying for position in the 2018 NFL Draft can best wide receiver John Ross’ record-setting time of 4.22 seconds from last year.

Check back for updates as the Combine continues through the weekend.

Check out Nyheim Hines’ dash:

Wondering how Saquon Barkley would have done in a race against Alvin Kamara, Leonard Fournette or Ezekiel Elliott? You’re in luck.

Visit NFL.com for complete running back results.

Visit NFL.com for complete wide receiver results.

UCF linebacker Shaquem Griffin ran the fastest 40-yard dash for a linebacker at the combine since 2003.

Wondering how Shaquem would have matched up with stars at other positions? Again, you’re in luck:

Or how he would have run against his twin brother, Shaquill, who participated in the 2017 NFL Combine?

Visit NFL.com for complete linebacker results.

Visit NFL.com for complete quarterback results.

Visit NFL.com for complete tight end results.

Visit NFL.com for complete defensive linemen results.

The large lads on the offensive line may not put up the lowest raw numbers, but speed plus size is a combination NFL scouts are always watching for. Leading the way on Friday, renowned 2016 Piesman Trophy winner Brian O’Neill of Pitt burned his way to the fastest time in his group.

Visit NFL.com for complete offensive linemen results.