Updated

St. Louis, MO (SportsNetwork.com) - The St. Louis Rams named Gregg Williams defensive coordinator on Wednesday.

Williams, who replaces Tim Walton, spent the 2013 season with the Tennessee Titans, where he served as a senior assistant/defense. The Titans made great strides defensively last season, ranking 16th in points per game and 14th in total defense.

"I am excited about coaching this defense," said Williams. "I would like to thank Jeff Fisher and the Rams organization for this opportunity and I am looking forward to getting to work and helping our defense become one of the best in football."

Walton was fired at the end of the season. His defense gave up 364 points last season, 13th in the NFL. It ranked 19th against the pass and ninth against the run.

Williams has presided over five separate top-five total defenses during his coaching career, and as a defensive coordinator or head coach (15 seasons), Williams has led seven top-ten overall defenses.

Williams and head coach Jeff Fisher have previous experience working together as Williams was on Fisher's staff for six seasons with the Titans/Oilers, including four as defensive coordinator.

Williams was the defensive coordinator in New Orleans from 2009-11. He was suspended for the entire 2012 season for his role in Bountygate.