Racehorse injuries generally a mixture of sand, silt and clay. Turf tracks are usually Bermuda grass in warm climates and a mixture of Fescue, Bluegrass and Rye in more temperate climates. Synthetic tracks are generally a mixture of sand, synthetic fibers, rubber and wax. Synthetics are differentiated by brand names such as Polytrack, Tapeta Footings and Cushion Track. North American racing is run on all three types of tracks and provides the best basis for a comparison on how track composition affects injuries and fatalities. The EID was finally able to provide statistics on racing related fatalities in March 2010. The TOBA
1921 Buffalo All-Americans season George Halas, and the Buffalo All-Americans, led by quarterback Tommy Hughitt and fullback Catchy Oliphant, were the two top teams in the league; each playing all of their games at home, Buffalo and Chicago amassed 6–0 records in league play. On Thanksgiving 1921, Buffalo played one of its only road games of the season, in Chicago, and prevailed 7–6. Chicago demanded a rematch. The All-Americans agreed to rematch the Staleys on December 4, again in Chicago, on the condition that the game would be considered a "post-season" exhibition game not to be counted in the standings; had it not, Buffalo