As seen in Concussion (2015). When Dr. Bennet Omalu (Will Smith) needs to learn about football, he turns to Offensive Football Systems. Offensive Football Systems (now with 78 play diagrams!) gives a brief overview of the popular offenses of American football. From the single wing to the wishbone to the hurry up spread, the reader will learn the advantages and disadvantages of 26 of the most popular offenses in football history. It is written not only to provide insight into popular strategies and schemes, but also as a brief guide for coaches who are choosing an offense to implement.