Professional Softball Salaries. The National Pro Fastpitch softball league says its players make approximately $5,000 to $6,000 for a 48-game season running from June through August.According to a 2013 article in The New York Times, some U.S.-based female professional softball players make up to $20,000 per season.ach NPF team has a $150,000 salary cap. U.S. women's professional softball players often seek to supplement their salaries by heading to Japan, where they can earn $60,000 or more playing for corporate teams. However, only the very best players draw offers from the Japanese teams.