Joshua Zuchowski Takes Almost 3 Seconds Off 11-12 400y IM NAG

During today’s prelims session at the 2017 NCSA Age Group Championships, 12-year-old Joshua Zuchowski destroyed the 11-12 NAG record in the 400 yard IM, taking almost three full seconds off of the old mark.

Tuesday prelims results

Zuchowski, who swims for Flood Aquatics in Florida, went 4:08.92, becoming the youngest swimmer to ever break 4:10 in a 400 IM. The previous 11-12 record belonged to Nick Silverthorn, and it stood at 4:11.77. Silverthorn, currently a junior on the Cal Bears swimming & diving team, swam that time back in 2008.


Josh Zuchowski, 2017

  • Fly – 57.25
  • Back – 1:02.80
  • Breast – 1:12.74
  • Free –  56.13
  • Total – 4:08.92

Zuchowski went the fastest time in the 11-12 division at NCSA’s by over 37 seconds in this morning’s prelims, and took over 17 seconds off of the meet record. His previous best time in this race was a 4:18.86 from November, meaning he took almost 10 seconds off of that in one go.

He first broke an LCM NAG back in April of 2015, taking the 100m back 10& under NAG with a 1:09.07. Then, he went a 4:45.03 in the 400m IM two weeks ago to break the 11-12 NAG by 6 seconds, only to follow that with a 2:14.93 to take down the 200m IM 11-12 NAG.

This morning, Zuchowski also went 25.15 in the 50 back to break Ronald Dalmacio‘s meet record by over three tenths, though Dalmacio still has the NAG record at 24.11. Zuchowski still moves up to #9 all-time in the age group in the 50 back. He also split a 28.05 breaststroke on Flood’s 200 medley relay, the only swimmer to break 30 seconds on any 11-12 relay.

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Ronald Dalmacio swam a 23.65 50 yd back this past weekend at the Southern California Swimming Junior Olympics to set a new NAG record. Watched it live. He is a beast and a great kid. Congrats.


Dalmacio broke the NAG in the 50 back I believe at JOs last weekend. 23.65. Also went 21.86 50 free. 1:52.94 200 back, and 51.42 100 back

About Karl Ortegon

Karl Ortegon

Karl Ortegon studied sociology at Wesleyan University in Middletown, CT, graduating in May of 2018. He began swimming on a club team in first grade and swam four years for Wesleyan.

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