She played five seasons for the Phoenix Mercury of the Women's National Basketball Association (WNBA).

In the Women's National Basketball League (WNBL), Timms made 285 appearances and won five championships.

[2] At the onset of the WNBA in 1997, Timms was assigned to the Phoenix Mercury in the initial player allocation.

Her debut game was played on June 22, 1997 in a 76 - 59 win over the Charlotte Sting where she recorded 8 points, 6 rebounds, 6 assists and 2 steals.

[3] Timms had a very dominant rookie season with averages of 12.1 points, 3.7 rebounds, 5.0 assists and 2.6 steals per game.

The Mercury finished with a 16 - 12 record and made the playoffs but were eliminated in the semi-finals by the New York Liberty.

Recording a lower average in minutes played, points, rebounds and steals than her previous season.

The Mercury was still able to complete the season with a 19 - 11 record and reach the finals but lost to the Houston Comets.

Timms' final WNBA game was played on August 14, 2001 in a 56 - 38 win over the Houston Comets where she recorded 10 points, 4 assists and 2 rebounds.