San Francisco also used a good amount of Cover Four , which is basically man coverage on the outside .
The Niners would challenge routes more with their defensive backs , not relying as much on linebackers underneath to get depth and take away throwing lanes .
Niners   also used a good amount of Cover Four , which is basically man coverage on the outside .
The Niners would challenge routes more with their defensive backs , not relying as much on linebackers underneath to get depth and take away throwing lanes .