Rowan Cox Breaks Thomas Heilman’s 17-18 NAG With 50.64 100 Butterfly

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2026 U.S. National Championships

Men’s 100 Fly – Finals

Top 8 Finishers

  1. Ilya Kharun (SUN) — 50.05
  2. Caeleb Dressel (SJAC) — 50.45
  3. Rowan Cox (TXLA) – 50.64
  4. Logan Robinson (TXLA) — 51.38
  5. Matthew Klinge (OSU) — 51.59
  6. Tyler Ray (TXLA) — 52.62
  7. Maximus Williamson (LAC) — 51.97
  8. Kamal Muhammad (FAST) — 52.83

18 yr previous Rowan Cox swam to a brand new 17-18 National Age Group (NAG) file, touching in a 50.64 100 butterfly for third on the 2026 U.S. National Championships. That broke the earlier NAG of a 50.70 set by Thomas Heilman finally summer season’s 2025 U.S. National Championships.

Split Comparison

Cox Heilman
50 23.9 23.76
100 26.74 26.94
50.64 50.7

Cox was out 0.14 slower than Heilman however got here house 0.20 sooner to get beneath the previous file. Cox turns 19 a month from now together with his birthday on August twenty eighth.

Cox, a Texas commit for this fall, entered the meet with a lifetime greatest 52.59 he swam a the 2024 Junior Pan Pac Championships. He has been as quick as a 53.88 this season that he swam for 18th on the US Open again in December. The swim marks Cox’s first ever NAG file.

In addition to his NAG file, Cox additionally turns into the 2nd quickest 17-18 ever on the planet within the occasion. Only Kristof Milak has been sooner as he swam a 50.62 at 18, a time that sits because the World Junior Record.


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