The United States-based Indian, who won a gold in the recent Commonwealth Games in Glasgow, collected two points by virtue of finishing second in the season opening leg in Doha on May 9 with a throw of 63.23m.
His second best finish was a fifth in Birmingham leg on August 24 with a throw of 62.78m.
World Championships silver medallist Piotr Malachowski of Poland finished overall winner and ran away with USD 10,000 prize money, while world and Olympic champion Robert Harting of Germany was second (USD 6,000) and Gerd Kanter of Estonia was third (USD 4,000).
The best effort by the 31-year-old Indian in the top flight event though was a 62.78m. He has a season's best throw of 65.62m at Tucson in USA in May.
Iranian Ehsan Hadadi, who is expected to be Gowda's main competitor for a gold medal in the September 19-October 4 Asian Games in Incheon, South Korea, competed in three Diamond League legs with a third place finish in New York on June 14 with an effort of 65.23m being his best.