Quoted: According to Dr. Alison Brooks of the University of Wisconsin Madison, it?s not that simple. As Brooks points out, many football players are prone to high-risk behavior to begin with (seeing as they chose to be football players), and risk-taking individuals tend to be more inclined towards drugs, alcohol, and aggressive behavior. For many of these individuals, any number of additional factors might contribute to violent behavior: steroid use, drug and alcohol abuse, and underlying mental health issues.