Sparks and Steely Dan are the two maps in my range that answer the same question in opposite ways. Both started as proper five-piece bands. Both ended up as two men and a rotating cast of hired players. Drawing them side by side is the clearest evidence I have that a band can be a line-up or an idea, and that the latter lasts longer.
The numbers come from my own research sheets, the ones the artwork was drawn from. The Steely Dan map carries 127 credited names across only nine albums. The Sparks map spreads a smaller cast across three times as many releases. On both, exactly two people are credited for everything.
What follows is what the two sheets actually show, including four musicians who appear on both.
What the Sparks and Steely Dan maps have in common, and where they part
This table comes from a fresh parse of both sheets, not from a discography listing.
| Sparks | Steely Dan | |
|---|---|---|
| The two who never leave | Ron and Russell Mael, brothers | Walter Becker and Donald Fagen, college friends |
| What the map plots | 26 studio albums, 1971 to 2025, plus FFS, marked as a collaboration | 9 studio albums, 1972 to 2003 |
| Credited on every station | Ron and Russell, and nobody else | Becker and Fagen, and nobody else |
| Busiest single album | Introducing Sparks (1977), 18 credited | Gaucho (1980), 41 credited |
| Leanest studio album | Gratuitous Sax & Senseless Violins (1994) and Exotic Creatures of the Deep (2008), 4 each | Can't Buy a Thrill (1972), 13 |
| Longest-serving hired hand | Dean Menta, guitar, 6 releases | Victor Feldman, percussion, 7 of the 9 albums |
| Shape of the line count | Mostly single figures for five decades | Climbs from 13 to 41 in eight years |
Both began as actual bands, and both line-ups were gone within six albums
This is the part people forget. Neither act is set out as a duo.
On the first two Sparks records, Halfnelson in 1971 and A Woofer in Tweeter's Clothing in 1973, the supporting cast is exactly three people: Earle Mankey on guitar, Jim Mankey on bass and Harley Feinstein on drums. Five names on the sheet, twice. After that, the three of them never appeared on a Sparks album again.
Steely Dan took slightly longer to shed theirs. Jim Hodder on drums and Jeff "Skunk" Baxter on guitar for the last three albums each. David Palmer, brought in to sing the songs Fagen did not want to sing, lasts two. Denny Dias holds on the longest of the original group, from Can't Buy a Thrill in 1972 through to Aja in 1977.
Drawn as lines, those are short stubs at the left-hand edge of two very long sheets. On both maps, the band is a thing that happens at the start and then stops.
Steely Dan replaced the band with the best players money could find
The Steely Dan sheet has one of the steepest climbs in my whole catalogue. Can't Buy a Thrill has 13 credited musicians. By The Royal Scam in 1976, it is 24, by Aja in 1977, it is 37, and Gaucho in 1980 reaches 41.
Forty-one people on one record made by two men who had stopped touring entirely. That is the number that makes the map worth standing in front of, because it looks like a band map at first glance and turns out to be nothing of the kind.
The famous one-offs sit exactly where you would expect. Mark Knopfler plays lead guitar on a single Gaucho track and never appears again. Wayne Shorter turns up once, on Aja. Both get a branch line one station long, which is the honest way to draw a cameo.
Underneath it all, Victor Feldman is credited on seven of the nine albums, making him the most consistent presence on the map after the two principals themselves.
Sparks did the opposite, and mostly got smaller
Where Steely Dan expanded, Sparks contracted. Across five decades, the Sparks sheet stays in single figures for most of its length: five, five, five, six, seven, five at the start, and six, six, nine, six, six at the end.
Two albums feature four credited musicians: Gratuitous Sax & Senseless Violins (1994) and Exotic Creatures of the Deep (2008). On records like those, the map is close to being two lines and a couple of branches.
The one genuine spike is Introducing Sparks in 1977, with 18 credited names, the album where the brothers hired a room full of Los Angeles session players rather than a band. It is also, as I have written elsewhere, the album where not one of those session players ever returns to a Sparks record.
Except that four of them turn up somewhere else entirely.
Four musicians appear on both the Sparks map and the Steely Dan map
This is the finding that made me want to draw the two side by side. Working through both sheets, four names cross from one to the other, and all four cross via that single 1977 Sparks album.
| Musician | On the Sparks map | On the Steely Dan map |
|---|---|---|
| Lee Ritenour | Introducing Sparks (1977) | Aja (1977), guitars |
| Ed Greene | Introducing Sparks (1977) | Aja (1977), drums |
| David Paich | Introducing Sparks (1977) | Pretzel Logic (1974) and Katy Lied (1975), piano and keyboards |
| Ben Benay | Introducing Sparks (1977) | Countdown to Ecstasy (1973) and Pretzel Logic (1974), guitar |
Ritenour and Greene are the ones I keep coming back to. Both are credited on Introducing Sparks and Aja, and both records were released in 1977. The same two players were in Los Angeles studios that year, working on an album now regarded as a high point of studio craft and on a Sparks record the brothers themselves later moved away from.
There is a near miss alongside them. Mike Porcaro is credited on Introducing Sparks, and his brother Jeff Porcaro is on three Steely Dan albums. Two sets of brothers, two maps, and the two Porcaros just failing to share a sheet.
None of this is visible in a discography. You only see it if you have plotted both sets of credits by hand and then gone looking. It is the sort of thing I have collected in my piece on session musicians who appear on more than one map.
Why do some producers get a line, and most do not
My rule across every map is the same: a producer only earns a musician line if they are also credited playing or singing something. Producing alone, however decisive, does not put a route on the sheet.
Sparks gives the clearest example of it working. Giorgio Moroder is on the map for No. 1 in Heaven in 1979, credited for synthesiser and vocoder as well as production, so he qualifies twice over. Tony Visconti is on there too, for orchestral arrangements on Indiscreet in 1975 and again on Plagiarism in 1997, a 22-year gap between two stations on the same line.
On the Steely Dan sheet the same rule keeps the engineer Roger Nichols to a single credit, for the gong on "East St. Louis Toodle-Oo", which is my favourite example of the rule doing exactly what it should.
Which of the two maps suits which listener
Go for Steely Dan if the person reads credits for pleasure and already knows what Bernard Purdie and Chuck Rainey did to those records. The reward is watching 127 names arrange themselves around two that never move.
Go for Sparks if the appeal is endurance rather than personnel. Fifty-four years, 26 studio albums, and two brothers who kept going while every other line on the sheet started and stopped around them.
Both prints are a Giclée on 230gsm premium fine art paper with a textured matte finish, archival and acid-free, in A2 (594 x 420 mm, 23 x 16 in) and A1 (841 x 594 mm, 33 x 23 in), plus 24 x 18 in and 36 x 24 in for buyers in the USA. Unframed from £42, or ready to hang in a black wood frame. A1 is the one to pick, because both sheets contain many short names.
The two maps in this piece
Sparks Discography Tube Map Art Print, 26 studio albums plus the FFS collaboration, 1971 to 2025.
Steely Dan Discography Tube Map Art Print, 9 studio albums and 127 credited names, 1972 to 2003.
Questions about these two maps
Are Ron and Russell Mael really on every Sparks station?
Yes, on every station plotted, which is more than any other name on the sheet by a distance. The next longest line belongs to Dean Menta on six.
Are Becker and Fagen on all nine Steely Dan albums?
Yes, both of them, on every one from 1972 to 2003. They are the only two names on the sheet that manage it. Walter Becker died in 2017.
What is not on these maps?
Live albums, compilations and soundtracks are left off both, so the Annette soundtrack and any musician credited only on it do not appear on the Sparks map. The Steely Dan map plots tonly he nine studio albums Solo records are not on either, so Donald Fagen's own albums and the Mael brothers' film work sit outside these two sheets. Producers with no playing credit do not get a line.
Why does Steely Dan have more musicians than Sparks on a third of the albums?
Because they were buying something else. Sparks kept a small circle and constantly changed style. Steely Dan kept the style tight and changed the personnel on almost every track until it sounded the way they wanted.
Where do the numbers come from?
From my own research sheets, built by hand from album credits over several years, and they are the sheets the artwork was drawn from rather than a database export. There is no AI at any stage.
Related reading and maps
For each act on its own, I have written up Sparks albums in order and Steely Dan albums in order.
If the pattern itself is the interesting part, how many musicians play on an album compares the counts across all 70 maps, and which bands never changed their line-up looks at the opposite case entirely.
Both prints sit in the Music Wall Art Prints collection. If you are buying for someone and cannot choose between the two, an art print gift card passes the decision to them.
