[2][3] Tregear is a versatile netballer capable of covering WA, C and GA. After co-captaining the Melbourne Kestrels in the Commonwealth Bank Trophy.
She captained Victorian Fury to success in the Australian Netball League in 2008.
It was this form that earned her, as Chelsey Nash, a callup to the Melbourne Vixens squad.
At the end of the 2009 season, she was awarded "Rookie of the Year" by the Vixens and was chosen for the Australia national netball team, known as the Diamonds.
Tregear is a qualified Podiatrist with the Moorabin Foot Centre,[5] although she has changed to playing netball under her husband's surname for the 2011 ANZ Championship Season.