Carson Foster Does it Again: Re-Lowers 400 IM NAG Record in Finals


16-year old Carson Foster has re-broken the 15-16 National Age Group Record in the 400 meter IM in Saturday’s finals session at the 2018 Junior Pan Pacific Swimming Championships.

After taking down the old Phelps record in prelims, Foster lowered the mark again to 4:14.73 in finals. His older brother Jake finished 2nd in 4:15.78.

In spite of the time being a small drop for Carson Foster, his splitting was quite different. Whereas in the morning, he relied on his front-half, in the afternoon, he turned halfway about a second behind the pace.

Then a monster breaststroke leg drew him close to the metaphorical record line, and a better-than-average freestyle leg pulled him past it.

Comparative Splits:

Carson Foster Saturday AM 57.02 1:03.52 1:14.08 1:00.30 4:14.92
Carson Foster Saturday PM 57.58 1:03.99 1:13.13 1:00.03 4:14.73

We were unable to locate Phelps’ splits from the 2001 US Spring National Championships anywhere. If you have them, please send to [email protected], and we’ll update the table above.

Sean Grieshop’s Meet Record and World Junior  Record of 4:14.00 from the 2016 US Olympic Trials still stands, while the Meet Record remains a 4:12.59 done by Chase Kalisz in 2012.

Later in the session, Foster anchored the American 800 free relay in 1:49.68.

Both Foster brothers train with the Mason Manta Rays in Ohio.

Full Race Video:

In This Story

Leave a Reply

9 Comment threads
13 Thread replies
Most reacted comment
Hottest comment thread
20 Comment authors
newest oldest most voted

Won’t start a ridiculous debate today….
Rather well done to both Carson and Jake, USA 400IM legacy is shining brightly can’t wait to see what they do in 200IM and Carson 200bk.
Super talents

He Said What?

Beautifully stated!


Who is this Phelps guy of which you speak?


He was a pretty good age group swimmer who never really panned out. Not sure why everyone makes a big deal about him.

25 free champ

Lol, I seriously hope you’re joking. On a swimming thread I would hope almost everyone knows who MICHAEL PHELPS is.

Tiny hands

I think I just heard a “whoosh”


I seriously hope you know what SARCASM is


I think you should visit r/wooosh sometime

Philip Johnson

Just some guy, won a bunch of Olympic golds.

running start to touch backstroke flags

Other countries should swim short course yards to stay competitive. Whatever they are doing is not enough. The American future is so Deeeeeeppppp… it is unreal


I think renovating just every pool in Britain to be 25 yds would be hugely expensive, never mind the world.

Local pools in most countries (France and Aus the exceptions I can think of) are 25m, not sure the extra turn every 7/8 lengths makes a huge difference.

What benefits the US swimmers technically (turns and underwaters) is that short course really matters and is treated very seriously at a senior level, I think that same benefit would come if NCAAs were a SCM event.




That works for a LCM pool, but there are few of those in Britain at least. It’s not so easy in a dilapidated local pool from the 1960s which is 25m (so moving the bulkhead to anything other than either end just turns it into a kiddie pool).

Incidentally I’m probably one of very few non-American swimmers to have been brought up training in yards, but it was 50 yards (LCY, if that’s a thing).


Togger, you seem earnest, and it’s your willingness to indulge “Running Start” that is leading to downvotes… The comment wasn’t worthy of a serious response. There’s no evidence that training SCY instead of SCM gives a swimmer any advantage. The reason the US puts out so many elite swimmers has to do with other factors: membership (probably over 2 million youth swimmers when USS, YMCA and summer leagues are combined); infrastructure (an incredible number of exceptional facilities); resources/access/wealth (good-paying jobs for coaches, sports culture ingrained in high-schools and colleges, well-functioning institutions that promote and organize the sport, healthy kids/competitors with access to nutritionists, psychologists, physical therapists, massage therapists, quality gyms etc.). It would make a lot more sense for the… Read more »

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!