Jim Caldwell nearly went undefeated as a rookie coach in Indianapolis three years ago and he's one win away from returning to the Super Bowl as an assistant with Baltimore.

Yet Caldwell didn't get one interview for any of the eight coaching vacancies in the NFL this year.

"That's almost impossible for me to comprehend," John Wooten, chairman of the Fritz Pollard Alliance Foundation, told The Associated Press on Friday.

Eight teams hired new coaches and seven more filled general manager positions with the New York Jets completing their search by hiring John Idzik. None of those jobs went to a minority.

Now the league is considering revisions to the "Rooney Rule," which mandates that teams must interview at least one minority candidate for front-office and head coaching jobs.

"While there has been full compliance with the interview requirements of the Rooney Rule and we wish the new head coaches and general managers much success, the hiring results this year have been unexpected and reflect a disappointing lack of diversity," Robert Gulliver, the NFL's executive vice president of human resources, said in a statement.

"The Rooney Rule has been a valuable tool in expanding diversity and inclusion in hiring practices, but there is more work to do, especially around increasing and strengthening the pipeline of diverse candidates for head coach and senior football executive positions.

"We have already started the process of developing a plan for additional steps that will better ensure more diversity and inclusion on a regular basis in our hiring results. We look forward to discussing these steps with our advisers to ensure that our employment, development and equal opportunity programs are both robust and successful."

Wooten said his group is already working on a proposal.

"We feel very strongly there's a need to extend the rule," Wooten said. "I'm disappointed, but not discouraged because we have a plan of action. We're putting it together right now and we're going to present our thoughts and ideas to the league. We'll be working together to make something happen."

Caldwell won his first 14 games with the Colts in 2009 before losing the final two regular-season games after resting Peyton Manning and most of his starters. The Colts reached the Super Bowl only to lose to the New Orleans Saints. Indianapolis went 10-6 the following season and captured another AFC South title, but lost to the Jets in a wild-card game. With Manning sidelined all of last season, the Colts went just 2-14 and Caldwell lost his job.

He joined the Ravens as quarterbacks coach and was promoted to offensive coordinator in mid-December. Baltimore has averaged 25.8 points in the five games since Caldwell replaced Cam Cameron. In two playoff wins, the Ravens have scored 62 points, including 38 in a double-overtime win at Denver last week.