Yeah, I also thought the characters didn't know each other, and since Dubs is relatively new in town, I'll assume he's probably the character with the least knowledge about the rest of the team.
But if anyone knew anything about him (and I'll leave that to crackpot to tell us if they do), they'd know that he's a pretty decent wheelman, has a good ride and is somewhat proficient with first aid. He lives for cars/racing, and often talks about it or references it.