I think we need some starting assumptions -- otherwise it's too easily one way or the other.
1) Pretend all 10 men and the tiger are ready and willing to die for the cause.
2) Let's say a mix of positions, some power, some speed, some agile.
3) Enclosure of half an acre sounds about right.
4) Let's say the team has worked together before and can all communicate.
Given this...it's hard to see the football team not winning. It would certainly mean casualties, but human beings are equipped with lethal weapons all the same. The tiger's greatest advantages are its bite, its claws, and its speed. The bite could kill you instantly, the claws could do a lot of damage, and the speed means that if the 500 pound -- 800 pounds max -- beast comes at you at full speed, it'd be like getting hit by a car.
So you need to get up close to it -- everyone simultaneously surrounding it -- to mitigate its velocity advantage, and then try to limit its ability to bite and claw while you weary it with kicks and bites and punches. You'd want 4-5 of the big guys pinning the tiger down, 3-4 attack its head, and maybe two watching to see where they can help -- not to get too vicious, but a tiger has weak spots like all the rest of us, and you could tear its tail off/break it with enough force, and then the tiger is significantly less balanced.
TL;DR -- if Arnold can kill the predator, ten RGIIIs could kill a tiger.