For most of Dan Campbell’s tenure with the Detroit Lions, he’s had an offense good enough to compete for a Super Bowl, but a defense that played like an anchor dragging his team down. It’s been the only thing missing from his championship puzzle. But on Sunday, that missing piece was found. The Lions showed what they hadn’t shown all season long in their 20-17 win over the Green Bay Packers — that they are capable of playing good defense against good teams, and coming away with big plays when they need them most. They threw a net over the Packers’ big-play passing game, got a key fourth-quarte...