Walker attended the
University of California. She played four seasons with the Bears of Cal. She played the
forward position and the
center position. Walker was the only player in Cal history to score at least 1,000
points, 800
rebounds, 200
assists, and 100
blocks. She recorded 47 career
double-doubles. She is ranked first in Cal history for rebounds, free-throws made, and free-throws attempted. As a freshman, she was one of three Cal players picked to the Pac-10 All-Freshman squad, marking the first time a conference team had more than two selections. As a sophomore Walker was selected to the All-Pac-10 team along with
Devanei Hampton, marking only the second time in school history that the Bears placed two players on the All-Pac-10 squad. When she became a junior she became one of only four Cal players to garner first-team All-Pac-10 honors at least twice. She was named to the Pac-10 All-Defensive team and
Sports Illustrated second-team All-American. As a junior, she became the 17th Cal player to reach the 1,000-point milestone. As a senior at Cal she was the 2008–09 Pac-10 scoring leader averaging 19.8 points per game. She was named to the First team All-Pac-10 and First team Pac-10 All-Defensive team. ==WNBA career==