One artist who's mascot I work is Mike Ray from Ink Tycoon. I'm sure if you used iStockphoto and looked for certain illustrations you may have come across his work. His creations are vector and clean, I know, because I had to find an image for a project one time and I ended up using one of his. I can appreciate good vector art and I also like mascot logos. I wanted to share with you his branding for the Rugby team Coventry Bears. You can see the sketch and the final result with the logo on the team jerseys.
You can see the logo being worn on the left side