National Pro Fastpitch (NPF), formerly the Women's Pro Softball League (WPSL), was a professional women's softball league in the United States. The teams battled for the Cowles Cup. The WPSL was founded in 1997 and folded in 2001; the NPF revived the league in 2004. A new softball league is planned for 2022, the Women's Professional Fastpitch (WPF), and the NPF will be disbanded.