Apparently, according to my office mates, some fellows from the US are not sporting as hard as the fellows from another country. So... y'know, folks, SPORT HARDER!
Or whatever it is you need to do, I mean. At this point, the extent of my knowledge about things is that they should avoid biting anything on the playing field. Since they are presumably adults, and capable of not gnawing on random objects and/or persons, I kind of figure that there is something else they may need to be doing.
Maybe try more of that? Whatever it is?