a former UCLA hard-hitter whose career was derailed by injury
In the 2011 season, Dietrich Riley flashed as a physical, versatile UCLA safety with 36 tackles, an eight-tackle game at Arizona, and a reputation for violent downhill contact; he was widely viewed as a promising defensive back before neck and shoulder injuries ended his college career in 2013. His differentiator was tone-setting aggression and special-teams value, but the major question mark was durability after a vertebra-fusion surgery and lingering medical issues. For any roster fit, the upside was clear—if healthy, he brought edge and attitude—but the injury history was the defining factor.
