Walker was a three-year starter at linebacker and center.

As a senior, he was chosen to represent Idaho in the East-West Shrine Game and the Chicago All-Star game. He was voted the Most Valuable Defensive Player in the Shrine Game after recording 15 tackles, two interceptions and one blocked punt.

He was honored by his teammates by being chosen team captain his senior year. Walker was drafted in the fourth round by the Detroit Lions, where he went on to enjoy a highly successful career at linebacker and placekicker.

He was selected to the NFL All-Rookie Team his first year and later was honored with five Pro Bowl appearances. Walker twice was chosen the Idaho Male Athlete of the Year – in 1968 and 1971 – and is a member of the Idaho Sports Hall of Fame.

After retiring from professional football, Walker went on to an Emmy-award winning career as a sports broadcaster for KPIX-TV in San Francisco. He spent 11 years as a color analyst for CBS sports and retired as the color commentator for the San Francisco 49ers.