Every year the NFL raft comes and goes, and every year each team hopes one of their picks will turn the tide to make their teams instant contenders.
In this slideshow are 32 players who made a huge impact their first year with their teams.
Before the list begins though, I have to admit a couple of things:
First, before 1981, the NFL did not track tackles and sacks as statistics.
Since I was born in 1983, I did not see a lot of the best defenders of all time play, and going back to look at just rookie years was difficult to pick defenders as being the best rookie in their franchise's history.
Second, remember this is just rookie seasons; some players might not have had a great career, but came out of the gates like gangbusters.
Enjoy the list, and I am indeed open to suggestions.