Haslett led the Washington defense for the past five seasons. In his tenure with the team, the Redskins ranked 31st, 13th, 28th, 18th and this season ranked 20th overall in total defense. The defense up gave 27.4 points a game in 2014, tied for 29th in the NFL.
"Jim and I have had discussions over the last few days and have decided that it's best for everyone that we have a new defensive coordinator for the Washington Redskins," Redskins head coach Jay Gruden said in a statement. "I wish him nothing but the best in the future."
The Redskins went 4-12 this season after going 3-13 in 2013.
"Jay and I mutually agreed it's time for the Redskins to have a new defensive coordinator," Haslett said. "I want to thank Dan Snyder, Bruce Allen, Coach Gruden and all the players and fellow coaches for their efforts the last five years and I wish them nothing but the best."
Haslett, 59, has also led the defensive units with the St. Louis Rams, New Orleans Saints and Pittsburgh Steelers. He was the Saints head coach for six seasons and the Rams interim coach in 2008, compiling a 47-61 record.
- Scooby Axson