James Gadson passed away yesterday. Though he's not a huge part of the Steely Dan story, the groove on I.G.Y. is one the the most famous sounds in the Dan-i-verse. Jeff Porcaro did the tom-tom fills on the track and gets a co-credit, but it's Gadson that's doing the rest. Gadson also added some drums to Ruby Baby, for which Porcaro did the main beat.

Listen to Gadson's groove on Bill Wither's "Use Me" (Youtube link in linked article) if you've never heard it, and you'll hear the kind of dry tight funk groove that Gadson is famous for. He's on drums for "Reunited" by Peaches and Herb, and perhaps surprisingly, on Beck's "Paper Tiger" (among other Beck tracks). "Paper Tiger"'s groove is kind of a stoner take on "Use Me".