Through two days of training camp, the Green Bay Packers defense has been the energizer bunny, flying around the field and looking light on their feet. Year two under Jeff Hafley as the defensive coordinator comes with plenty of excitement, but also curiosity about how that side of the ball will improve. “Guys are just playing faster, playing confident,” said safety Evan Williams. “Once you understand how this defense works and how guys are gonna attack us, it allows you to play faster and exploit those plays,” said defensive lineman Kenny Clark.