statistically significant?

[tjd2001]

I should remember this from college statistics, but can’t for the life of me…any help is greatly appreciated: Over the past 5/6 years, my office football pool has produced one very odd result: one participant has a 756-524 record over that time (compared to the next best record of 690-590, I think his performance is pretty amazing). How statistically significant is his performance….can it all be placed on luck….or is he out picking the “50/50” spread? Is this a large enough sample size? If not, what would be a large enough sample size?

If someone could give me the basic math as a starting point, I’d like to be able to figure out similar situations myself.

Thanks!