Please provide more information about the musician "Bob Thompson" you are referring to. There are many musicians with this name. To help me identify the correct one, please specify:
* Genre of music: (e.g., rock, jazz, country, etc.)
* Any other details: (e.g., band name, specific album, era of music)
Once you provide more details, I can help you find the birthdate of the Bob Thompson you're looking for.