Lutkenhaus, who turns 17 on Dec. 19, is in line to break the record of youngest American to compete at track and field worlds held by Mary Cain, who ran the 1500m at 17 years, 3 months old in 2013. Lutkenhaus will shatter the record of youngest U.S. man to compete at worlds — Erriyon Knighton in the 200m at 18 years, 5 months in 2022.