Getting the defense back to performing at a high level has been a priority for the Green Bay Packers after last season.
General manager Ted Thompson used the team's first six draft picks on defensive players and also signed a few free agents to bolster depth on that side.
More changes ensued as the Packers held their first practice of training camp Thursday.
A day after the team released veteran Charlie Peprah, star cornerback Charles Woodson worked extensively at the starting safety spot previously held by Peprah.
Green Bay's defense, which ranked last in the NFL in 2011, had other new looks.
Jarrett Bush was ahead of Sam Shields at one of the starting cornerback positions. First-round draft pick Nick Perry lined up opposite All-Pro Clay Matthews at outside linebacker.