Crumb Rubber Cancer?

Scientist have never discovered the crumb rubber cancer but, there has been some media attention on the topic. After dozens of soccer players have been diagnosed with cancer, a soccer coach says she has the answer on how they may have developed cancer. The soccer coach thinks that the artificial grass has been the source to the cancer that has appeared among the players. Considering that the rubber that goes into the artificial grass is made from shredded tires its not a crazy observation to make. The tires that are used have been found with arsenic, benzene,and nickel. Many of these chemicals have been linked to cancer. So saying that crumb rubber can cause cancer is not crazy. Considering that hundreds of schools across the nation are installing crumb rubber to their fields is scary. Little to no research has been done to confirm that crumb rubber causes cancer.