Weeks has worked in the studio or toured with a wide range of artists, including Gregg Allman, David Bowie, Jimmy Buffett, Kevin Chalfant, Eric Clapton, Hank Crawford, Bo Diddley, The Doobie Brothers, Lou Fellingham, Aretha Franklin, Isaac Hayes, George Harrison, Donny Hathaway, Etta James, Billy Joel, Chaka Khan, B.B.

King, Neil Larsen, Lyle Lovett, Gail Davies, David Lee Roth, Michael McDonald, Don McLean, John Mayer, Bette Midler, Randy Newman, Pino Palladino, Boz Scaggs, John Scofield, Carly Simon, Soulive, Rod Stewart, The Rolling Stones, James Taylor, Joe Walsh, Steve Winwood, Bobby Womack, Stevie Wonder, Ronnie Wood and Eikichi Yazawa.

Weeks also played with the Fabulous Amazers and Bill Lordan (pre Robin Trower drummer) in the Minnesota group Gypsy.

[4] He also played bass at Clapton's Crossroads Guitar Festival on July 28, 2007 at Toyota Park in Bridgeview, Illinois.

With Gypsy With Donny Hathaway With Herbie Mann With Stevie Wonder With Gloria Jones With Splinter With Aretha Franklin With Randy Newman With Ronnie Wood With Rod Stewart With George Harrison With Don McLean With David Bowie With James Taylor With Carly Simon With David Cassidy With Terry Garthwaite With Kenny Vance With Al Jarreau With Richie Havens With Dianne Brooks With The Miracles With Maria Muldaur With David Batteau With Steve Winwood With Gregg Allman Band With Cher and Gregg Allman With Lenny Williams With Dan Fogelberg With Joe Walsh With Rickie Lee Jones With Bette Midler With The Whispers With Adam Mitchell With Chaka Khan With Stephen Bishop With Michael McDonald With Bill LaBounty With John Mellencamp With Patrick Simmons With Rosanne Cash With Jimmy Buffett With William Lee Golden With Webb Wilder With Etta James With Vince Gill With Kenny Rogers With Marty Balin With Ronna Reeves With Joan Baez With Wynonna Judd With John Michael Montgomery With Tracy Lawrence With Billy Burnette With Chris Norman With Rodney Crowell With Clarence "Gatemouth" Brown With Peter Cetera With Janis Ian With Tanya Tucker With Mac Gayden With Russ Taff With Lisa Brokop With Dan Hill With Lari White With Anita Cochran With Mark Nesler With Tara Lyn Hart With Sonya Isaacs With Robert Cray With Gov't Mule With The Tractors With Hal Ketchum With Alicia Keys With Keb' Mo' With Amy Grant With J. J. Cale and Eric Clapton With John Mayer With Eric Clapton With LeAnn Rimes With Boz Scaggs With Leon Russell With John Oates With Colin James With Mark Ronson With Cyndi Lauper With Elizabeth Cook With Ronnie Baker Brooks With Gloria Gaynor With Wendy Moten With Cravity