I hold the Chicago Bears' record for most career sacks, and my jersey number is retired. Although I terrorized opposing quarterbacks, I was known for my quiet demeanor off the field. I played my entire 12-season NFL career with the Bears. Who am I?

1. My nickname referenced a ferocious animal.
2. I was a first-round draft pick by the Bears in 1985.
3. I was part of the legendary 1985 Bears defense.
4. I was known for 'The Grab' a play against the Vikings.