The series of hammer throw competitions for men and women were primary held at meetings with IAAF World Challenge status.
The rankings were decided by combining the total (in metres) of each athlete's three greatest throws at the permit events during the season.
The challenge was designed to allow hammer throwers to compete in a global seasonal competition, similar to that found for other track and field events on the Diamond League.
[1] The most successful athlete of the series was Poland's Anita Włodarczyk, who won the women's title six times straight from 2013 to 2018.
[4] Germany's Betty Heidler and Hungarian Krisztián Pars have each won the title on three occasions.