The name of this character is Suppo and yes, this name is a derivative of the word supporter. He embodies everything that is Columbus Crew Soccer Club, knowing only the colors of them team. The team is known for being "America's Hardest Working Team" and Suppo lives up to working hard as a supporter. The action of rolling up the sleeves entails that he means business in every aspect of life, which is a typical no-nonsense trait of the people in Ohio and surrounding states. Suppo is an invention of sorts that began in a comic strip, but could eventually be more visible at Columbus matches. 
Globally, supporter groups have used cartoon figures (similar to Suppo) for their logos. Who knows, maybe Suppo could be a logo for a newer supporter group in the Nordecke. Here are several logos (club team listed next to logo)
AIK Stockholm (Sweden)
FC Lorient (France) 
SC Corinthians (Brazil) 
VfB Stuttgart (Germany)
Olympique Lyonnais (France)