Jeff Baxter left long ago with occasional special guest appearances.
Sadly several members have died. Keith Knudsen (drummer; 2005), Michael Hossack (Drummer; 2012), Cornelius Bumpus (Sax; 2004).
The core of the Doobies is Tom Johnston, John Mcfee & Pat Simmons. They've adopted several musicians to fill out the rest of the band.
John Cowan – bass guitar, vocals
Guy Allison – keyboards, backing vocals
Marc Russo – saxophones
Ed Toth – drums
Tony Pia – drums, percussion