Pro Football Writers Association NFL Defensive Player of the Year

PFW/PFWA Defensive Player of the Year award
The Professional Football Writers of America (PFWA) is the official voice of pro football writers, promoting and fighting for access to NFL personnel to best serve the public. The PFWA is made up of accredited writers who cover the NFL and the 32 teams on a daily basis.
From 1969 to 1991, the Defensive of the Year award was presented by Pro Football Weekly only. PFW and the Professional Football Writers of America combined their awards in 1992. In 2013 the award was presented by PFWA alone.
See also

All-Pro
Defensive Player of the Year Award (NFC and AFC) (Kansas City Committee of 101 Awards) (since 1969)
NEA NFL Defensive Players of the Year (defunct)
UPI AFC and NFC Defensive Player of the Year Award (since 1975) (defunct ?)
NFL Offensive Player of the Year Award
NFL Most Valuable Player awards
Bert Bell Award
...