9th IAAF World Youth Championships Johanna Gretschel Jul 17, 2015 Tags: 9th IAAF World Youth Championships Interview Interviews Day 1 Adrian Piperi of The Woodlands, Texas threw the shot put for 22.00m (72-2.25) to win the gold medal at the IAAF World Youth Championships. The mark set a U.S. Youth Record and World Youth Lead.