... in order for teams to counter line-shifts without the o-line having to adjust assignments.

Second so that smaller (athletic) line-men can be effective despite size and strength disadvantages.

And to counter increasingly athletic pass-rushers by utilizing more athletic o-linemen.

Today in the NFL the ZBS is catching on with about a dozen of the teams in the league running it.

And it has seen some success:

Mike Shanahan installed it in Denver, and it made an unspectacular Terrell Davis look great. But it is being reported that Josh McDaniels is doing away with the ZBS in Denver.

With the ZBS, the Seahawks were able to win a Super Bowl behind the rushing of Shaun Alexander, who at ...

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