At the age of 16, Chelsea left the sport of baseball to play softball, where she is a utility player.

Her first appearance for the Senior National Team was later that year, in a series against China at Redland City, Queensland.

Chelsea's first Senior World Championship appearance was in 2010 in Venezuela, where the Aussie Spirit finished 6th.

In 2016, she planned to play for the Dallas Charge in the National Pro Fastpitch League and also represent Australia at the 2016 ISF Women's World Championships in Surrey, Canada.

[1] Starting off in the junior system, she competed at the 2003 U14 Australian National Baseball Championships in Alice Springs, Northern Territory where she represented Western Australia.

In 2007, she was a member of the Australian side that competed at the International Softball Federation Junior Women's World Championships in the Netherlands,[4][6][7][8][9] where she earned a bronze medal.

[10] She represented Western Australia at the 2007 Australian U-19 Women's Fastpitch Championship, where her team lost to New South Wales in the finals.

She was a member of the national team in 2007 and participated in a six-game test series against China in the Redlands.

[22] Forkin was selected for the Australian women's national softball team at the 2020 Summer Olympics.