The pocket isn't a set space on the field, as it changes based on each play. It's an area that forms around the QB on passing plays.
Film Analysis: Cam Newton's development as a pocket passer - Cat
Horse collar exception for quarterbacks in pocket remains - NBC Sports
BIG FOOTBALL POCKET TEE -GO OUT Version- 水道管が破裂
The Pocket Book of Pro Football 1977: Herbert M Furlow: : Books
Pro Football Season Schedule Pocket Point
ITP Glossary: Climbing The Pocket - Inside The Pylon
American football - Wikipedia
What is a hip-drop tackle? And why NFL owners banned
The NFL's official rules are presented in this pocket-sized, definitive reference. All aspects of the game are covered in detail, including the rules
The Official Rules of the NFL 94-95
Passing pocket - Wikipedia
Analysis: NFL can't find elusive sweet spot to protect QBs
What is the Pocket in Football? (Full Explanation)
The 1990 Penn State Nittany Lions finished 9-3 under legendary coach Joe Paterno.
Penn State Football 1990 Insider's Pocket Guide Joe Paterno
EJ Manuel scouting report: analysis of pocket play, accuracy