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Speed may not be everything in football, but outrunning the guy on the other side of the line of scrimmage is a good place to start.

And the teams with the fastest offenses in the NFL, featured here, have plenty of guys who can do just that.

To determine which units have the most speed, we'll use the same formula found in the breakdowns of the 10 Fastest Teams in the NFL as well as the 10 Fastest QBs in the NFL.

Long story short, you take the 40 time of each player and add two-hundredths of a second for every year he's been in the NFL. The number, which we'll call Age-Adjusted 40, comes from ESPN.com's Bill Barnwell, then writing for Grantland.

To apply it to offenses, we'll add the Age-Adjusted 40s of the starting quarterback, top two running backs, top two receivers and No. 1 tight end. (Speed's useless if it's not on the field.)

Lowest combined time wins.