also: man pressure
A blitz with man coverage behind it. Every eligible receiver has a defender, so nobody is sitting in the space a blitzer left.
The defense brings extra rushers and plays man coverage behind them. Every eligible receiver has a defender, and nobody is sitting in the space the blitzer left. If one defender loses his matchup, no zone help is waiting behind him. If the blitz does not arrive, the quarterback has time against one-on-one coverage.
man pressurezone blitz, zero blitzA zero blitz is one kind of man pressure: nobody is left deep. Man pressure can also keep a post safety, so the two names are not interchangeable.