[AnotherUnixGeek]

He joined the Doobie from 1976 to 1981, after he sang for Steely Dan.

I think McDonald continued as part of Fagen and Becker's crew of studio guys even after he joined the Doobie Brothers - pretty sure that's his background vocal on "Peg" from the "Aja" album in 1977 and I believe he also worked on 1980's "Gaucho" album.

[nickcarraway]

He is on Peg, and Time Out of Mind on Gaucho, but he did frequent background work. He sings on Kenny Loggins songs (And they wrote What a Fool Believes together, he sings on Christopher Cross songs, etc. And of course, he sings on songs by his wife, Amy Holland.

[nickcarraway]

The funniest part of Peg, was they had seven different top flight guitarists record the solo, before they went with Jay Graydon's. And they even made him work on it for at least six hours.