After many personnel changes a year ago, Mike Pettine’s defense aims for big steps in 2020 | Nfl

GREEN BAY — Adrian Amos would much rather be with his Green Bay Packers defensive teammates right now — practicing on the grass of Ray Nitschke Field, sitting side by side in meeting rooms inside Lambeau Field, and going out to impromptu bonding dinners at various Northeast Wisconsin eateries.

That’s what went on a year ago, when Amos arrived as a veteran free agent — along with field-tilting, culture-altering outside linebackers Za’Darius Smith and Preston Smith — and the…