Released as an EP on October 15 2013, PAX AM Days collects tracks recorded by Fall Out Boy during a two day session at PAX AM Studios in Los Angeles, California. The lyrical and musical direction for the tracks was influenced by 1980s and 90s punk and hardcore rock, described by the band on their Facebook page as
a collection of songs we did for fun… us letting out some demons
In collaboration with producer Ryan Adams, the songs accidental in nature and are said to be the material closest to recorded improvisation. Reflecting this, the studio was set up in the same manner as guitarist Joe Trohman’s parents attic used for rehearsals during the early days of their career.
The album artwork features American tennis champion John McEnroe, photographed destroying a racket during a hot-headed meltdown. The rage and passion of the album is connected to this, with Pete Wentz telling MTV:
There’s something about that kind of passion and that kind of rage that we really drew on; this EP is very ’Super Brat.’ It’s sometimes how we feel in the world of pop music… Like, we have this rage and passion and we don’t look exactly right, but here we are to make some noise.