Ive used this https://github.com/BurntSushi/nfldb and this https://github.com/BurntSushi/nflgame to make this http://www.ffgraf.com/
Ive used this https://github.com/BurntSushi/nfldb and this https://github.com/BurntSushi/nflgame to make this http://www.ffgraf.com/