'Desperado' by The Eagles was never released as a single. be seeing you
Technically, that's not quite true.
It is true that at the time the "DESPERADO" album was released,
only "Tequila Sunrise" & "Outlaw Man" were released as singles.
But years later, in the '80s, when most major record labels were
reissuing past hit songs on "back-to-back hit gold 45's".....
Elektra / Asylum paired "Desperado" with one of Eagles' hit singles.
I want to say it was "Hotel California" or "New Kid In Town".
But I'm not positive of that.
During that time period, that same thing happened with a few more
popular album tracks that had not been released as singles before.
Four others that the same thing happened to that I recall having
were Jim Croce's "Lover's Cross" & "Age" (both from "I GOT A NAME"),
Bee Gees' "More Than A Woman" (from "SATURDAY NIGHT FEVER") &
AC/DC's "Dirty Deeds Done Dirt Cheap".