He played on two Allman Brothers Band classics, Ramblin' Man and Jessica ... On top of all that, Dudek also once jammed onstage with Mike Bloomfield – though the latter hadn't actually invited ...

and guested onstage with Mike Bloomfield (without him knowing). Oh, and have you ever heard the song Ramblin' Man? That's Dudek harmonizing his electric guitar lines with Dickey Betts at the end.