GREEN BAY, Wis. -- This should come as no surprise to those who follow the Green Bay Packers: They're one of only three teams that has not added a player who was on another team last season since free agency opened on Tuesday.

The others: the Baltimore Ravens and Pittsburgh Steelers.

All three teams are deeply rooted in a draft-and-develop philosophy.

The Packers' only action has been to re-sign three of their own free agents: receiver Randall Cobb, tackle Bryan Bulaga and quarterback Scott Tolzien.

It means that since the start of the new NFL year on Tuesday at 4 p.m. ET, 29 of the 32 teams have signed at least one player who finished last season on another team's roster. That includes both unrestricted free agents and players who were cut.

The Packers were in a similar position last year at this time but then made their first move on March 15, when they signed pass rusher Julius Peppers. Three days later, they added defensive tackle Letroy Guion. Both players had been released by their previous teams and were not true unrestricted free agents.

On the other end of the spectrum are the Atlanta Falcons and Oakland Raiders, who each have signed a league-high seven players from other teams since free agency opened on Tuesday. The Jacksonville Jaguars and New England Patriots each have added six new players, while the Indianapolis Colts, New York Giants, New York Jets, Philadelphia Eagles and Tennessee Titans each have added five new players. Those numbers do not include trades.

Complete team-by-team moves can be followed on Bill Polian's free-agent tracker via ESPN Insider.