Mr. Fagen: When Walter came over, we started on the music, then started filling in more lyrics to fit the story. At that time, there had been a lineman with the Los Angeles Rams and the San Diego Chargers, Deacon Jones. We weren’t serious football fans, but Deacon Jones’s name was in the news a lot in the 1960s and early ‘70s, and we liked how it sounded. It also had two syllables, which was convenient, like “Crimson.” The name had nothing to do with Wake Forest’s Demon Deacons or any other team with a losing record. The only Deacon I was familiar with in football at the time was Deacon Jones.That's from a WSJ story by Marc Myers, who also draws out Johnny Carson's contribution to the song;
Mr. Fagen: When everything was recorded—the rhythm section, the horns and the background vocals, Walter and I sat in the studio listening back and decided we needed a sax solo, someone to speak for the main character. We liked the sound of a tenor saxophonist who played in Johnny Carson’s Tonight Show band, a cat who blew like crazy when the show went to a commercial. He had this gutsy sound, but we didn’t know who it was.They asked around, and found;
Pete Christlieb: I went over to the studio one night after the Tonight Show finished taping at 6:30 p.m. When I listened on headphones to the track Tom had arranged, there was just enough space for me to play a solo.All that jazz; a lot of the right people, in the right place, at the right time.
As I listened, I realized Donald and Walter were using jazz chord changes, not the block chords of rock. This gave me a solid base for improvisation. They just told me to play what I felt. Hey, I’m a jazz musician, that’s what I do. So I listened again and recorded my first solo. We listened back and they said it was great. I recorded a second take and that’s the one they used. I was gone in a half-hour. The next thing I know I’m hearing myself in every airport bathroom in the world.