St. Louis Rams coach Jeff Fisher Fisher said Thursday he consulted with NFL commissioner Roger Goodell before hiring Gregg Williams as his defensive coordinator.

"I had a conversation with the commissioner who not only endorsed Gregg, but felt that (hiring) Gregg would be a good move," Fisher said at a press conference to formally introduce Williams.

Reports last month indicated that Williams would be returning to St. Louis after he was set to take over the defense in 2012 until he was suspended for a year by the NFL for his part on the New Orleans Saints' bounty scandal.

Williams takes over two weeks after Fisher made the decision to fire Tim Walton.

Fisher said when he reached out to Williams, he knew full well that some fences would need mending. During the two years apart, Fisher and Williams rarely spoke. Fisher also had fired Williams' son, Blake, as linebackers coach after the 2012 season.

"We spent several days together, discussing the past, putting the past behind us, discussing the present and the future and direction of where we wanted to go with our defense," Fisher said. "Gregg and I came to terms with a lot of things."

Williams was asked how he and Fisher patched things up between them.

"Those are things that are between Jeff and I."

Williams returned to the league last year and worked on the Tennessee Titans' staff as a senior assistant/defense before head coach Mike Munchak was fired in January.

Williams and Fisher previously worked together for six years with the Houston Oilers/Tennessee Titans. Williams was Fisher's defensive coordinator for four of those seasons.

The Rams' defense finished 13th in the NFL in points allowed and 15th in yards allowed during the 2013 season, but opponents' 68.1 completion percentage was tied for the worst in the league.

"Gregg was my first choice and Tim was my second," Fisher said. "And I had a chance to go get my first choice. That was it. It had nothing to do with Tim. When you sit in my seat at the end of the hall, oftentimes there are some very difficult decisions that need to be made, and that was one of the more difficult decisions that I've made."

Williams is comfortable being reunited with Fisher.

"The fact that there's a great familiarity with us, but realize this -- it's been 14 years since we've been together," Williams said. "It's been 14 seasons we've competed against each other. It's fun to be back with people who think and believe the same way you are, so now you get a chance to spend more time with the players because you're spending less time having to sell or defend yourself with your staff before you ever get with the players."

Williams said he maintained hope that he could one day take the job he briefly had in 2012.

"I've always thought that this was a possibility," Williams said. "I've always thought that this was a great place to be."

Williams also called talk that he stole a playbook as "a joke."

Former NFL defensive end Renaldo Wynn said Williams told him that the Titans had Jacksonville's playbook and used it to prepare to beat the Jaguars in the 1999 AFC Championship Game. Wynn later backtracked on that claim.

"That was really a joke story," Williams said. "That was a joke, to me."

Williams said he compares notes on playbooks from around the league with other coaches, and that he has a large collection of old playbooks.

"I do collect playbooks," Williams said. "I love to see what other people call a term that you use. We understand football and don't need anybody else's playbooks."