WATCH: Luka Mijatovic Swims 3:40.96 400y IM, 2nd Fastest 16-Year-Old Ever

Video courtesy of Emily & Brandon Franklin. On Saturday at the 2025 CA/NV Sectionals in Walnut, California, Luka Mijatovic won the 400 IM in a lifetime best of 3:40.96. That 400 IM time is the 2nd-best in age group history, behind only Maximus Williamson, who swam 3:39.83 in 2022. Mijatovic was already #2 on that list with a 3:41.75 from April. Mijatovic doesn’t age up until April 22, so the 2026 Far Western Championships could be his final attempt at yards-course records before he turns 17.