5 January : Kristine Lilly announced her retirement after an international career that started shortly after her 16th birthday in 1987 .
Kristine Lilly 's 352 appearances for the US women 's national team made her the most - capped player in the sport 's history .
5 January : Kristine Lilly , whose 352 appearances for the US women 's national team made her the most - capped player in the sport 's history , announced her retirement after an international career that started shortly after her 16th birthday in 1987 .