The Dallas Cowboys made two massively important additions on the defensive side of the ball in Round 1 with the selections of safety Caleb Downs and edge rusher Malachi Lawrence. Both players are going to help reshape their respective position groups and should make the immediate impact the Cowboys desperately need. As a result of Downs, Lawrence and the rest of the team's picks on defense, Cowboys owner Jerry Jones believes the team has taken a big step in the right direction . "We've changed this defense," Jones stated. "What you're seeing going on right now is a product of three or four or five years or maybe more that we just haven't been able to ultimately get where we're trying to go and be a contender. It's going to be different, it's going to be fresh; we've got a lot of great energy here." When it comes to Lawrence, he opens up a slew of possibilities for the Cowboys and that's exactly what defensive coordinator Christian Parker wants .…