Lilly, who has captained the USA for the last three years, added: "I hope to play in the new league and if one day I get the chance to play for [new U.S. head coach] Pia [Sundhage], that would be fantastic. But for now, I'm focusing on becoming a mom for the first time and everything that goes with that experience."
Lilly is married to David Heavey, a firefighter in Brookline, Mass.
Lilly, a Connecticut product, has represented the USA at all eight of its Women's World Cup and Olympics appearances. Her 340 caps are a world record and her 129 goals are second highest in women's international soccer history to Mia Hamm's 158.