Bill Muir coached in the NFL for 30 seasons and was planning for a 31st, this one as the Chiefs&#x92; offensive line coach.</p><p>The 69-year-old Muir had an abrupt change of heart this week. On Wednesday, he walked into the office of Chiefs head coach Romeo Crennel and said he was retiring from the Chiefs and from football.</p><p>&#x93;I feel badly because they want me to stay,&#x94; said Muir, who joined the Chiefs in 2009 as offensive line coach and also served as coordinator last season. &#x93;I&#x92;m not leaving because of anything that has gone on or is going on or will go on with the Chiefs. This is a personal decision. It&#x92;s very personal. I&#x92;ve been denying myself a lot of things over the years, but I&#x92;m at a point in my life where I want to do some other things.</p><p>&#x93;I&#x92;ve been denying myself a lot of things over the years &#x85; there&#x92;s nothing earth-shaking. I&#x92;m not going to Egypt to climb the Pyramids yet. That&#x92;s on my bucket list.&#x94;</p><p>Quarterbacks coach Jim Zorn has interviewed for the vacant coordinator&#x92;s position. A source outside the Chiefs organization said Zorn is considering resigning if he doesn&#x92;t replace Muir as coordinator.</p><p>An attempt to reach Zorn for comment was unsuccessful. But through the Chiefs, Zorn said he didn&#x92;t plan to resign if he is passed over for the coordinator&#x92;s position.</p><p>Muir was one of the NFL&#x92;s top offensive line coaches over the past three decades. His NFL coaching career started in 1982 with Detroit and he later coached for four other teams before joining the Chiefs.</p><p>He served as offensive coordinator and offensive line coach under Jon Gruden in Tampa Bay from 2002 through 2008. The Bucs won the Super Bowl following the 2002 season.</p><p>&#x93;I&#x92;m not burnt out,&#x94; Muir said. &#x93;I have energy. I have more energy than most young coaches combined. I love coaching. But I will be 70 years old in October. The bottom line is that there are just some other things I want to do, and I&#x92;m running out of time to do them.&#x94;</p><p>Muir said he believes in Crennel&#x92;s ability to be a successful head coach in Kansas City.</p><p>&#x93;I love Romeo. I really do,&#x94; Muir said. &#x93;I think he&#x92;s going to do a whale of a job here. It&#x92;s almost been like a divorce, because I&#x92;ve been doing this for so long it&#x92;s a way of life.&#x94;</p><p>Muir said his decision to step down became solidified when he looked at the offseason schedule that awaited him.</p><p>&#x93;I get a week off during the league meetings (in the spring),&#x94; he said. &#x93;Then, I&#x92;ll get some time off in the summer. I just wanted more time to do things. I want to be able to be more in control of my time than football will let me do. The Chiefs were great about it.&#x94;</p><p>Muir&#x92;s retirement means Crennel has more work to do to fill out his staff.</p><p>The Chiefs this week announced the hiring of Tom McMahon, formerly of the St. Louis Rams, as their new special teams coach. They also said three coaches from last year&#x92;s staff will not return: Richie Anderson (receivers), Pat Perles (assistant offensive line) and Steve Hoffman (special teams).</p><p>That means Crennel is looking for an offensive coordinator and coaches for the offensive line and wide receivers.</p><p>&#x93;I am excited for Bill as he moves into retirement,&#x94; Crennel said. &#x93;I have known him for a long time and he is one of the finest coaches I&#x92;ve ever been around and an even better person. Bill is a very good friend and I have a great deal of respect for the way he worked. It was a privilege to work alongside him.&#x94;</p><p>Likewise, general manager Scott Pioli said he has &#x93;a tremendous amount of respect&#x94; for Muir.</p><p>&#x93;I have worked with him for a long time and have witnessed him develop a number of very good football players,&#x94; Pioli said. &#x93;His contributions are very much appreciated and he will be missed. We wish him the best moving forward.&#x94;