Walker attended Glenbard East High School in Lombard, Illinois, where he was honorable mention All-State.

He was named the team's Most Valuable Player in football, track and basketball, adding All-Conference gridiron honors as a senior.

Walker was a Second-team All-Big Ten Conference selection by The NFL Draft Report and Athlon Sports Magazine.

He finished with 22 tackles (12 solos), 2.5 sacks, 3.5 stops for losses and nine quarterback pressures, a Recovered fumble and deflected two passes.

The Seahawks promoted Walker to the active roster on November 10,[3] but he did not appear in a game with the team before being waived on December 26 to make room for wide receiver Mike Hass.