Claim: The 2015 Diamond League was an outdoor track and field event that consisted of fourteen one-day meets and was organized by the International Association of Athletics Federations, which has since been renamed World Athletics.
Evidence: The 2015 Diamond League was the sixth season of the annual series of outdoor track and field meetings, organised by the International Association of Athletics Federations (IAAF). It consisted of fourteen one-day meetings, starting on 15 May in Doha, Qatar, and ending on 11 September in Brussels, Belgium. World Athletics (name since October 2019, formerly known as the International Amateur Athletic Federation and International Association of Athletics Federations, both abbreviated as the IAAF), is the international governing body for the sport of athletics, covering track and field, cross country running, road running, racewalking, mountain running, and ultra running.