According to the Center for Responsive Politics, the National Football League spent far and away the most money of any sports league or entity on lobbyists on Capitol Hill in 2012.
NASCAR was tied for seventh-most with the NCAA and International Speedway Corp., which owns several NASCAR tracks. If you combined NASCAR with ISC, the two would rank fifth-highest.
The top 2012 spending by major sports organizations:
1. National Football League - $1,140,000
2. Ultimate Fighting Championship - $620,000
3. Professional Golfer's Association - $380,000
4. Major League Baseball - $310,000
5. Bowl Championship Series - $270,000
6. U.S. Olympic Committee - $240,000
T-7. National Collegiate Athletic Association - $150,000
T-7. NASCAR - $150,000
T-7. International Speedway Corp. - $150,000
9. National Basketball Association - $125,000
10. National Football League Player's Association - $120,000
You can see the Center for Responsive Politics' report here.