Joshua Zuchowski Re-Breaks 11-12 400 Yard IM NAG Record

12-year old Joshua Zuchowski has broken his own 11-12 National Age Group Record in the 400 yard IM.

Swimming on Saturday in the Elite Showecase Classic in Clearwater, Florida, Zuchowski swam a 4:07.81 in the final to win the event for his age group. That improves upon the 4:08.92 that he swam at the 2017 NCSA National Championships 3 weeks ago as the new best-ever in the age group.

Zuchowski has now been almost four seconds better than the next-fastest swimmer in 11-12 history: Nick Silverthorn, who swam a 4:11.78 in 2008.

Zuchowski’s previous best time, until his recent record-breakinig run, was just 4:18.86.

Earlier this week, Zuchowski shattered Chas Morton’s 11-12 NAG Record in the 200 yard IM, which had stood for 33 years. He has also broken National Age Group Records in the 200 yard back (1:52.47), the 200 meter IM (2:14.93), and the 400 meter IM (4:45.09).

Comparative Splits:

Elite Showcase Classic NCSAs
New Record Old Record
Fly 56.5 57.25
Back 1:02.16 1:02.80
Breast 1:12.44 1:12.74
Free 56.71 56.13
4:07.81 4:08.92


Leave a Reply

2 Comment threads
3 Thread replies
Most reacted comment
Hottest comment thread
5 Comment authors
newest oldest most voted

Wow, I’d like to see Joshua swim the 400 yd IM simultaneously with Chase Kalisz in the 400 m IM to see who would win; Chase would have to swim one of his best times to beat him! 😉


Hey genius Kalisz went 3:33 at NCAA’s

Bob O\'houlihan

i think he means lc

Lane Four

Hey genius. Look at the little m after the 400. That stands for 400 METERS IM. I think you owe DANJOHNROB an apology for your attitude problem.

bobo gigi

Mr Zuchowski is on fire. Can’t wait to watch him in long course.

About Braden Keith

Braden Keith

Braden Keith is the Editor-in-Chief and a co-founder of He first got his feet wet by building The Swimmers' Circle beginning in January 2010, and now comes to SwimSwam to use that experience and help build a new leader in the sport of swimming. Aside from his life on the InterWet, …

Read More »

Want to take your swimfandom to the next level?

Subscribe to SwimSwam Magazine!