From Coldstream, Richards was drafted in the 2000 National Draft to Collingwood, but took until 2004 to make his AFL debut. Continually developed into a good tap ruckman, Richards was forced to miss his early seasons as a football through injuries, mainly knee injuries hampered his start. When making his debut, he took time to become a dominant player but showed what he could, giving him 12 games since debut, before once again outed with a groin injury. It didn't stop him from winning the best first year player however, 2005 was like the early years, a knee and then hip injury, nothing went right. He was able to make a return for the final two games, playing to his full capability. In 2006 Guy was once again struggling with injury, managing only 9 games.