BC:
Read all of the linked articles--the idea is expressed, clearly and repeatedly, that Sunday work is to be avoided. You cherry-picked a quote from the end of one of the articles, and skipped the following:
The question of Sabbath work, then, invariably becomes an individual one. Knowing that some Sunday work is not only justified, but also needed, we must ask ourselves, “Is my situation such that Sunday work is unavoidable?”
Even though our decision may affect the lives of many people, the full weight of such a decision is upon the individual. But we needn’t decide alone. The Lord has promised inspiration and guidance in such major decisions.
If you are already in a job that requires Sunday work, you need to ask yourself the following:
Is there an alternative to Sunday work? Can I change my schedule?
If I did not work on Sunday, would it put an unfair burden on other employees? Could we trade Sunday shifts?
If I quit this job, what would happen to my family? Are there other employment possibilities that could keep us secure and yet allow me to participate fully in the Church and obey the Lord’s commandments?
Wouldn't LDS football players, particularly those who have university degrees, fall into this category?
You also managed to miss one quote that might have strengthened your position a little:
What is the impact of my work on the lives of others? Many who are involved in such public careers as athletics, entertainment, or politics find that their occupations demand at least some Sunday work or long distance travel on Sunday. Some that I discussed this with said they felt that the Lord gave them particular gifts that could be used to influence many people for good.
So if you're famous, it's OK, because you can "influence others for good".
Like antishock8, I wish I'd known about that little exception when I taught discussions.