While Durant has brought an energy to the Cowboys' defense so far in training camp, he's not the key person who joined Dallas this offseason to revitalize that unit. (Photo by Kevin Sabitus/Getty Images)And as the Cowboys' defense has been fired up and ready to fight back at the offense, Lamb has taken notice. It’s good to see your defense come out with that type of energy, that type of fire, that type of aggression early on. You got Matthew Stafford, the running backs in the backfield and the wide receiver core — it’s a sight to see when you’re in practice going up against it. "But now I’m here with the Dallas Cowboys, running a new defense with new guys on this defense.