Bob West auditioned for Barney back in 1987, like any voice actor would (with a written description of the character and maybe a picture). As he recalls, "I didn't get the description until a few minutes before the first audition (and no drawings?), so I had to pretty much create it on the spot, which is common. There was at least one callback audition, I think and the voice was adjusted a bit, as it was before and during early production. At the time, they were also considering using one person for both body and voice, but I was too tall for the costume they'd already started making."  Since then, Bob's voice for Barney has changed over the years. Bob's voice was not only used in the Barney and the Backyard Gang videos and on the Barney & Friends television show, but also on a 70 market radio show, on Multi-Platinum and Multi-Gold albums, for a feature film, for CBS and NBC primetime specials, as a Daytime Emmy presenter, for toys, for educational games, and for live tours and "personal appearances." In addition, he voiced interviews on The Today Show, Live With Regis & Kathy Lee, Oprah, The Phil Donahue Show, John & Leeza, Marilu, and appearances around the world. In 2000, (which was also his final year of voicing Barney), Bob retired from doing the purple dino's voice after doing his voice for 2 more Barney videos (Barney's Rhyme Time Rhythm, & Barney's Musical Castle), and the role was handed to Duncan Brannan, Tim Dever, and then Dean Wendt.
- Bob West's Barney voice is still heard daily at Universal Studios Florida's attraction A Day in the Park with Barney, as the show was prerecored back in 1995.
- Out of all the voices for Barney, Bob's voice is the most well known.
- In My Party with Barney, Bob shared the role with Duncan Brannan. West would sing and Duncan Brannan supplied the speaking voice.