There is a zone style of keeping your QB upright but it 's not a mandatory part of the concepts used by Gibbs to run the Broncos into the history books .
Upright teams combine with man - based protections .
There is a zone style of keeping your QB upright , which teams combine with man - based protections , but it 's not a mandatory part of the concepts used by Gibbs to run the Broncos into the history books .