There is a difference between what should be done and what can be done. James Bettcher, in his debut as defensive coordinator with the Giants last season, was unable to properly imprint the defense in his image. Anyone familiar with his work in Arizona knows it. All those grumpy Giants fans who witnessed meltdown after meltdown late last season know it.
And the man himself knows it.
“I think, and this is the truth, you do what you feel needs to be done for your players to have success and also to put your defense as a group in position to have success, and your team,’’ Bettcher told The Post on Wednesday after minicamp practice No.