She attended the University of Oklahoma, and was a first team All-American in 2001 and 2002. She was named the 2001 and 2002 Big 12 Conference Player of the Year and is the Big 12 all-time career assist leader (764). In 2002, she was the all-sports Academic All-American of the Year. She was the first Oklahoma player to record 1,700 points, 600 rebounds and 700 assists. During her senior year she led the Sooners to the NCAA Championship game where they lost to Connecticut. After leaving Oklahoma that year, she went by the married name "Dales-Schuman," but has used only "Dales" since divorcing her husband during her year off from pro ball.
Dales was drafted third overall in 2002 by the Washington Mystics, the highest pick ever for a Canadian. That year she was named to the All-Star Team as a replacement. In 2004 she announced her retirement from the league for the first time.
Later the Chicago Sky picked her up out of her one year retirement in the expansion draft of 2006 where Washington left her unprotected. She also served as a men's and women's college basketball analyst, as well as a sideline reporter for college football games on ESPN.
When she was with Washington, she was diagnosed with Raynaud's phenomenon in her hands. On April 5, 2008, Dales announced her retirement from the WNBA for the second time.