Who Would Be 15-16, 17-18 National Age Group Record Holders In The Stroke 50s?

by Sam Blacker 15

August 18th, 2025 National, News

One of the proposed amendments to the USA Swimming Rules & Regulations, announced earlier this week, was to introduce National Age Group Records for the 50m butterfly, backstroke and breaststroke.  This follows on from the announcement that the stroke 50s would be added to the schedule for the LA 2028 Olympics.

Previously, these events were only on the recognized list through the 13-14 age group, but with the new international focus they have received more attention domestically.  Of note, the corresponding yards events will not be eligible for NAG Records.

We have put the following top-ten lists together for each of these events in the respective 15-16 and 17-18 Age Groups.

Who Are The Familiar Names

Notable new record holders include Michael Andrew, who would gain an additional four NAG Records to add to the nine he already owns. That comes as no surprise, as Andrew made a significant dent in the record books as a junior, turning pro at 14 and owning records in every stroke in both yards and meters.

He would take the 15-16 and 17-18 records in both backstroke and butterfly, and put him just one record behind Luka Mijatovic in terms individual NAG records. Ahead of both of those two is Thomas Heilman, who owns a stunning 22 across fly, free and IM – although gains no new ones here.

Andrew made a niche for himself on the world stage as a versatile sprint specialist, competing in all four 50m events at the World Junior Championships in both 2015 and 2017. He won medals in all bar breaststroke in 2015, and then took gold in all bar breaststroke two years later.

Prior to this season Andrew would have added the breaststroke records in both of the age groups as well. However, the last couple of months have seen Ian Call and Campbell McKean beat out his times in the respective age groups.

McKean’s came in the final of the 50 breast at U.S. Nationals at the start of June, where he outtouched none other than Andrew himself, taking the win by two-hundredths of a second in 26.90. He would go on to win the 100 breast later in the meet, breaking the 17-18 record in that event with a time of 58.96 as he became (at the time) the youngest swimmer to break 59 seconds.

Another new record that came from a junior who broke out on the senior international stage. Lydia Jacoby set the 17-18 50 breast record in the spring of 2022, just months after winning Olympic gold in Tokyo.

Claire Curzan also gains a record set a year after an Olympic appearance. She was 25.43 in the 50 fly to lead the women’s 17-18 age group by three-quarters of a second,  with that time placing her just 0.11 seconds outside the medals at the 2022 World Championships.

There are several other current Team USA stars who make an appearance near the top of each of these lists – Regan Smith and Torri Huske, would both gain another record, with Thomas Heilman, Jack Aikins, and Jonny Kulow also near the top of the rankings.

Please note that although we have taken every care, there may be some swims missing from these lists. If you know of any, do let us know in the comments!

50 Backstroke (LCM)

Women’s 15-16

Rank Swimmer Time Meet Year Age Club
1 Regan Smith 27.85 Pro Swim Series 2018 15 Riptide
2 Missy Franklin 28.01 World Championships 2011 16 Unattached
3 Phoebe Bacon 28.02 Mare Nostrum – Canet 2019 16 Nation’s Capital Swim CLub
4 Rylee Erisman 28.08 U.S. Nationals 2025 16 Laker Swim
5 Isabelle Stadden 28.13 Summer Nationals 2018 16 Aquajets Swim Team
6 Alex Walsh 28.25 Summer Nationals 2018 16 Nashville Aquatics Club
7 Erika Pelaez 28.31 International Team Trials 2022 15 Eagle Aquatics
8 Rachel Bootsma 28.35 Pan Pacific Championships 2010 16 Aquajets Swim Team
9 Maggie Wanezek 28.39 Junior Nationals 2022 16 Elmbrook Swim Club
10 Emily Thomas 28.44 Pan Pacific Championships 2010 15 Unattached

Women’s 17-18

Rank Swimmer Time Meet Year Age Club
1 Leah Shackley 27.43 U.S. Nationals 2025 18 Wolfpack Elite
2 Rachel Bootsma 27.84 NCSA Junior Nationals 2012 18 Aquajets Swim Team
3 Erika Pelaez 27.95 U.S. Nationals 2025 18 Eagle Aquatics
4 Missy Franklin 27.98 Summer Nationals 2013 18 Colorado Stars
5 Regan Smith 28.07 World Junior Championships 2019 17 Riptide
6 Claire Curzan 28.08 International Team Trials 2022 17 TAC Titans
7 Grace Ariola 28.09 World Junior Championships 2017 17 Waves Bloomington/Normal Y S.T.
8 Julie Mishler 28.11 U.S. Nationals 2025 18 Fishers Area Swimming TIgers
9 Katharine Berkoff 28.13 Summer Nationals 2018 17 Missoula Aquatics Club
10 Kathleen Baker 28.18 Mare Nostrum – Monaco 2015 18 SwimMAC Carolina

Men’s 15-16

Rank Swimmer Time Meet Year Age Club
1 Michael Andrew 25.13 World Junior Championships 2015 16 Indie Swimming
2 Daniel Diehl 25.32 YMCA Nationals 2022 16 Cumberland Ymca Sea Otters
3 Jack Aikins 25.62 GPAC Flip Flop Invitational 2019 16 SwimAtlanta
4 Connor Johnson 25.89 YMCA Nationals 2024 16 Lakeland Hills YMCA
5 Bruce Shen 25.96 PN Long Course Championships 2024 16 Bellevue Club Swim Team
6 Luke Barr 26.00 Sectionals – Jenks 2019 16 Unattached
7 Davis Jackson 26.06 Futures Championships – Greensboro 2025 16 TAC Titans
8 Anthony Grimm 26.10 ISCA Summer Senior Championships 218 15 Unattached
=9 Nico Lee 26.12 Futures CHampionships – Sacramento 2025 16 Hillsboro Swim Team
=9 Michael Taylor 26.12 World Junior Championships 2018 16 Dynamo Swim Club

Men’s 17-18

Rank Swimmer Time Meet Year Age Club
1 Michael Andrew 24.63 World Junior Championships 2017 18 Race Pace Club
2 Ryan Murphy 25.04 Summer Nationals 2013 17 Bolles School Sharks
3 Will Modglin 25.11 Indiana Sectionals 2023 18 Zionsville Swim Club
4 Wyatt Davis 25.16 World Junior Championships 2019 18 Carmel Swim Club
5 Gavin Keogh 25.19 Junior Nationals 2025 17 Flatiron Athletic Club
6 Daniel Diehl 25.22 World Junior Championships 2023 17 YMCA of Cumberland
7 Daniel Carr 25.27 Summer Nationals 2017 18 Pikes Peak Athletics
8 Blake Amlicke 25.28 Junior Nationals 2025 18 Nashville Aquatic Club
9 Ryan Gridley 25.37 NCSA Summer Championships 2018 18 New Trier Aquatics
10 Miles Blackson-Dunbar 25.48 Junior Nationals 2025 18 Alpha Aquatics

50 Breaststroke (LCM)

Women’s 15-16

Rank Swimmer Time Meet Year Age Club
1 Emily Willham (née Weiss) 30.78 World Junior Championships 2017 16 Cardinal Community Swim Club
2 Zoe Bartel 31.28 World Junior Championships 2017 16 Fort Collins Area Swim Team
3 Ellie Andrews 31.31 World Junior Championships 2019 16 Dublin Community Swim Team
4 Olivia Anderson 31.49 World Junior Championships 2013 16 Aquajets Swim Team
5 Lucy Thomas 31.65 International Team Trials 2022 16 Elmbrook Swim Club
6 Piper Enge 31.66 Pro Swim Series – Mission Viejo 2023 16 Bellevue Club Swim Team
7 Nikol Popov 31.69 World Junior Championships 2015 16 Canyons Aquatic Club
8 Elle Scott 31.73 NC SwimMAC Martha McKee Charlotte Open 2024 16 SwimMAC Carolina
9 Lilly King 31.76 Summer Nationals 2013 16 Newburgh Sea Creatures
10 Margaret Aroesty 31.79 NCSA Spring Championships 2016 16 Unattached

Women’s 17-18

Rank Swimmer Time Meet Year Age Club
1 Lydia Jacoby 30.20 Mare Nostrum- Canet 2022 18 Seward Tsunami Swim Club
2 Kasey Carlson 30.34 World Championships 2009 17 Unattached
3 Piper Enge 30.53 World Championships 2024 17 Bellevue Club Swim Team
4 Lilly King 30.78 World University Games 2015 18 Unattached
5 Emily Willham (née Weiss) 30.87 Summer Nationals 2018 17 Cardinal Community Swim Club
6 Kaitlyn Dobler 30.92 World Junior Championships 2010 17 The Dolphins Portland Swimming
7 Kennedy Fisher 31.02 Junior Nationals 2022 18 Southeastern Swim Club
8 Rachel McAlpin 31.15 U.S. Nationals 2025 17 Mississippi Makos Swim Team
9 Elle Scott 31.16 Junior Nationals 2025 18 SwimMAC Carolina
10 Lucy Thomas 31.17 Summer Nationals 2023 17 Elmbrook Swim Club

Men’s 15-16

Rank Swimmer Time Meet Year Age Club
1 Ian Call 27.50 Junior Nationals 2025 16 Memphis Thunder Aquatic Club
2 Michael Andrew 27.89 NCSA Spring Championships 2016 16 Indie Swimming
=3 Sam Wolf 27.96 NCSA Summer Championships 2024 16 Badger Aquatics Club
=3 Josh Matheny 27.96 World Junior Championships 2019 16 Team Pittsburgh Elite Aquatics
5 Max McHugh 28.06 AP LC Nationals 2016 16 Unattached
6 Reece Whitley 28.28 NCSA Spring Championships 2016 16 Penn Charter Aquatic Club
7 Watson Nguyen 28.31 International Team Trials 2022 16 Fast Metroplex Aquatics
8 Carsten Vissering 28.37 World Junior Championships 2013 16 Nation’s Capital Swim Club
9 Wilson York 28.48 NCSA Summer Championships 2025 15 Lakeside Swim Team
10 Tyler Tannenberger 28.62 NCSA Summer Championships 2022 16 Swim Streamline at Northampton

Men’s 17-18

Rank Swimmer Time Meet Year Age Club
1 Campbell McKean 26.90 U.S. Nationals 2025 18 Bend Swim Club
2 Max McHugh 27.27 Summer Nationals 2018 18 Unattached
3 Michael Andrew 27.39 World Junior Championships 2017 18 Race Pace Club
4 Reece Whitley 27.63 Summer Nationals 2018 18 Penn Charter Aquatic Club
5 Watson Nguyen 27.75 World Junior Championships 2023 17 Metroplex Aquatics
6 Jake Lloyd 27.79 Junior Nationals 2025 17 Central Ohio Aquatics
7 Carsten Vissering 27.93 World University Games 2015 18 Unattached
8 Gunnar Hansen 27.98 Junior Nationals 2025 18 Lubbock Swim Club
9 Drew Gaerthofner 28.01 Futures Championships – Madison 2025 18 Wisconsin Aquatics
10 Austin Temple 28.06 Summer Nationals 2014 18 Tide Swimming

50 Butterfly (LCM)

Women’s 15-16

Rank Swimmer Time Meet Year Age Club
1 Torri Huske 25.70 World Junior Championships 2019 16 Arlington Aquatic Club
2 Claire Curzan 25.81 World Junior Championships 2019 15 TAC Titans
3 Charlotte Crush 26.18 NCSA Summer Championships 2023 15 Lakeside Swim Team
4 Mena Boardman 26.24 Pro Swim Series – Ft. Lauderdale 2025 16 Commonwealth Swimming
5 Gabi Brito 26.47 Junior Nationals 2025 15 Beach Cities Swimming
6 Emma Grace Richardson 26.60 U.S. Nationals 2025 15 SwimMAC Carolina
7 Lillie Nordmann 26.76 Mare Nostrum – Barcelona 2019 16 Magnolia Aquatic Club
8 Kendyl Stewart 26.78 World Junior Championships 2011 16 North Coast Aquatics
9 Lucy Velte 26.84 Junior Nationals 2025 16 Empire KC Swim Club
10 Alex Shackell 26.86 International Team Trials 2022 15 Carmel Swim Club

Women’s 17-18

Rank Swimmer Time Meet Year Age Club
1 Claire Curzan 25.43 World Championships 2022 17 TAC Titans
2 Kendyl Stewart 26.19 Summer Nationals 2013 18 North Coast Aquatics
3 Leah Shackley 26.20 World Junior Championships 2023 17 Blair Regional YMCA
4 Mena Boardman 26.23 U.S. Nationals 2025 17 Commonwealth Swimming
5 Charlotte Crush 26.38 Pro Swim Series – Ft. Lauderdale 2025 17 Lakeside Swim Team
6 Jada Duncan 26.57 Junior Nationals 2025 18 Sierra Marlins Swim Team
7 Kelsi Dahlia 26.66 Pro Swim Series – Mesa 2013 18 Unattached
8 Gretchen Walsh 26.73 Southeastern LC Championships 2021 18 Nashville Aquatic Club
9 Caroline Larsen 26.75 NCSA Championships 2024 17 Foxjets Swim Team
10 Emma Carlton 26.78 Summer Nationals 2017 17 Bellingham Bay Swim Team

Men’s 15-16

1 Michael Andrew 23.66 World Junior Championships 2015 16 Indie Swimming
2 Brady Campbell 23.90 Junior Nationals 2025 16 Mason Manta Rays
3 Justin Lynch 24.04 World Junior Championships 2013 16 Terrapins Swim Team
4 Thomas Heilman 24.19 International Team Trials 2022 15 Cavalier Aquatics/Piedmont Family YMCA
5 Yury Kuzmenko 24.32 Futures Championships – Sacramento 2025 16 Valley Splash
6 Luca Urlando 24.41 Pro Swim Series – Sacramento 2019 16 DART Swimming
7 Camden Murphy 24.42 NCSA Spring Championships 2016 16 Kingfish Aquatic Club of Waterford
8 Andrew Seliskar 24.44 Summer Nationals 2013 16 Nation’s Capital Swim Club
9 Cale Tebeest 24.49 Futures Championships – Madison 2025 16 McFarland Spartan Sharks
10 Langston Lindsey 24.5 Junior Nationals 2025 16 Swim Neptune

Men’s 17-18

Rank Swimmer Time Meet Year Age Club
1 Michael Andrew 23.22 World Junior Championships 2017 18 Race Pace Club
2 Jonny Kulow 23.43 Summer Nationals 2023 18 Sun Devil Swimming
3 Thomas Heilman 23.57 U.S. Nationals 2025 18 Cavalier Aquatics/Piedmont Family YMCA
4 Will Davis 23.65 Irish Open Championships 2018 18 Metro Atlanta Aquatic Club
5 Caeleb Dressel 23.86 SOuthern Zone South Sectionals 2015 18 Bolles School Sharks
6 Blake Manoff 23.91 World Junior Championships 2019 18 Unattached
7 Andrew Seliskar 23.96 Summer Nationals 2014 17 Nation’s Capital Swim Club
8 Joey Stauss 24.03 Junior Nationals 2025 18 Scarlet Aquatics
=9 Garrett Gould 24.04 NJ EEX JSM Summer Sizzle XXXII 2024 18 Greater Somerset County YMCA Storm
=9 Matt Josa 24.04 Summer Nationals 2013 18 SwimMAC Carolina

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jeff
10 months ago

for the 17-18 50 back: I don’t know if it counts but Regan’s 50 split in her 100 WR would rank 2nd at 27.74. I also don’t think she went to jr worlds that year but she does have a 28.08 from a PSS when she was 17

jeff
Reply to  Sam Blacker
10 months ago

Unless I’m missing something (which I may be), I don’t think she attended world juniors in 2019 right after senior worlds? It looks like Annabel crush and Claire Curzan were the two US girls swimmers in the 50 back

Admin
Reply to  jeff
10 months ago

OOOOH that’s a good one. I guess it would count?

Water
Reply to  Braden Keith
10 months ago

A 50 back split of a 100 does not count if the swimmer does a flip turn with no hand touch. It can count if the swimmer does a hand touch and an official observes the touch.

JimSwim22
Reply to  Water
10 months ago

Seems silly that the solid from the other 3 strikes count but not back. I get the different rules in the touch but still seems silly

LCM Guy
10 months ago

The streets remember Michael Taylor’s 2015-2016 run and what he could have accomplished if he hadn’t sustained tragic and devastating injuries

randomswimmer2
Reply to  LCM Guy
10 months ago

He was so good. Brutal that he wasn’t able to reach his full potential cause of injuries

JimSwim22
10 months ago

I wonder what Mary T split in her 100 at Brown Deer?

LBSWIM
Reply to  JimSwim22
10 months ago

She came back fast on the second 50. Her split was 27.75 back in 1981.

JimSwim22
Reply to  LBSWIM
10 months ago

I guess that makes sense given her 200 speed

LBSWIM
Reply to  JimSwim22
10 months ago

ya she chased them down! Here is her in 1984 :

https://www.youtube.com/watch?v=kYxaCq47zEI&t=364s

Doe
10 months ago

What about yards?

Curious George
Reply to  Doe
10 months ago

Gone!