The camera is less important than the lens for what you are trying to do.
When my oldest child became active in soccer I wanted pictures. One attempt at action pictures with a Point and Shoot convinced me I needed an SLR and I purchased a 40D with a 28-135mm IS - immediately things were looking better.
Then the next season I needed more reach as the field got bigger. I first tried a 75-300mm, being on a budget, and the pictures in focus looked good but the number in focus was not fun at all. After one frustrating game, I picked up a 70-200mm f4L and was immediately happy. I missed the reach of the 75-300 but the camera was a pleasure to use. Our sponsor, Roger, puts it this way, this is a "gateway lens".http://www.lensrentals.com/rent/canon/lenses/telephoto/canon-70-200mm-f4l
You didn't say which football games you want to shoot - if it's anything but Varsity games under the lights I would recommend spending your money on "good" but reasonably affordable lenses like the 70-200 f4L. If it is Varsity that you really want to shoot then yes, faster lenses with IS are going to be important. I happily shoot till sundown, but after a quick search in Lightroom found the last time I tried to shoot a game under the lights was back in 2009 and the shots weren't great. (I need to try this again as I've upgraded to a 7D, use a monopod, and just plain have a bit more knowledge and practice.)
The good news is your choice to move to Canon because of the huge catalog of lenses with offerings at almost every price point. I was kind of depressed for a friend who shoots Sony when he asked for a recommendation for an upgrade to his kit lenses and it was hard to find anything between kit lenses and very-expensive lenses in Sony's lineup. Third party lenses were the only choice for him at the price point he could afford. (There are some good third-party lenses but you have to be a bit pickier in your shopping.)
I won't say the 7D isn't a better camera than the 60D for sports - it is and was a choice I made when upgrading last year. It's also a more complicated camera and it's forced me to be more involved in setting the camera up to do what I want. My main point is either body will be frustrating unless you get lenses that are appropriate for the sports and the conditions you want to shoot in.
On my sports photography journey as a hobbyist, I've learned these lessons:
- SLRs for sports,
- Better Lenses,
- Learn to Postprocess
- use a monopod
- shoot RAW if possible for more options in postprocess
- practice shooting and postprocessing.