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:

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3 years ago

The Foster brothers are so talented.

In the 400 IM, Carson is more a front-half swimmer. Jake is more of a back-half swimmer (1:09 in the breast is amazing).

They looked thrilled with their swims.

frustarted fan
Reply to  marklewis
3 years ago

Together they go 4:10 🙂

3 years ago

In what way?

David Berkoff
3 years ago

Those are really incredible swims. Team USA is simply crushing it. My daughter told me that the team is really close and that the Foster boys are “super nice” and “so supportive of one another”. Clearly great parenting and coaching. Go USA.

Reply to  David Berkoff
3 years ago

Congratulations to Katherine for her silver and bronze medals representing Team USA! It looks like somebody else did a pretty good job of navigating the roles of parenting/coaching himself!

3 years ago

Amped to see what the Fosters will do in the 200 im, Carson has stated in interviews he believes that will end up being his best event. However, not sure if he just wants to deny the fact he is a 400 imer, which is understandable lol. Seems increasingly likely Carson, if not Jake as well, will be vying for an olympic spot in two summers. He also seems to be ultra focused on LCM, as the only SCY meets I recall him competing in this year were HS leagues, sectionals, districts, and states (which I assume he just swam to be eligible for states), as well as two invites (mostly relays), winter juniors, ISCA cup, and Ohio State also… Read more »

3 years ago

According to TYR Rankings, Carson is now tied for #20 this year in the 400 IM! Should we start considering him for the SwimSwam Pick ’em list for the 2020 Olympics in this event? Congrat’s to both Foster brothers!

3 years ago

Wow! his stroke is nice, easy, and beautiful.

running start to touch backstroke flags
3 years ago

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.

Reply to  Togger
3 years ago


Reply to  fit2swim
3 years ago

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).

Reply to  Togger
3 years ago

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 »

3 years ago

Who is this Phelps guy of which you speak?

Reply to  Scribble
3 years ago

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
Reply to  monsterbasher
3 years ago

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

Tiny hands
Reply to  25 free champ
3 years ago

I think I just heard a “whoosh”

Reply to  25 free champ
3 years ago

I seriously hope you know what SARCASM is

Reply to  25 free champ
3 years ago

I think you should visit r/wooosh sometime

Philip Johnson
Reply to  Scribble
3 years ago

Just some guy, won a bunch of Olympic golds.

About Braden Keith

Braden Keith

Braden Keith is the Editor-in-Chief and a co-founder/co-owner 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, …

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