I am a Chicago Bears linebacker known for my exceptional tackling ability and leadership on the field. My career was tragically cut short due to ALS, but my legacy of perseverance and dedication continues to inspire. Who am I?

1. I played college football at Baylor University.
2. I was drafted by the Bears in the third round.
3. My jersey number was 50.
4. I was known for my 'Monster of the Midway' mentality.