SwimSwam Summer McIntosh Downs Pair of World Records At Canadian Trials; U.S. Names 47 To Worlds Roster

McIntosh Makes More History: Summer McIntosh has been on fire through the first three days of the Canadian Swimming Trials in Victoria, breaking a pair of mind-boggling world records while recording the third-fastest swim in history in the 800 free.

Also: All of the highlights from the U.S. National Championships as the Americans finalize their 2025 World Championships roster, updates through the early stages of the Australian Trials, and the House settlement is granted final approval.

McIntosh Breaks 400 Free, 200 IM World Records At Canadian Trials

Summer McIntosh reclaimed the world record in the women's 400 free and then took down the decade-old mark in the 200 IM two nights later at the Canadian Swimming Trials, putting a real scare into Katie Ledecky's 800 free world record in between for good measure.

McIntosh opened the competition with the 400 free, using a phenomenal back half to finish in a time of 3:54.18, knocking 1.20 seconds off Ariarne Titmus' world record of 3:55.38 set at the 2023 World Championships.

McIntosh lowered her Canadian Record and personal best time by nearly two seconds, having previously been 3:56.08 at the 2023 Canadian Trials, which was a world record at the time.

There have now only been three swims sub-3:56 in history, with Titmus having done so a second time at the 2024 Australian Olympic Trials.

All-Time Performances, Women's 400 Freestyle (LCM)

1. Summer McIntosh (CAN), 3:54.18 – 2025 Canadian Swimming Trials
2. Ariarne Titmus (AUS), 3:55.38 – 2023 World Championships
3. Ariarne Titmus (AUS), 3:55.44 – 2024 Australian Olympic Trials
4. Summer McIntosh (CAN), 3:56.08 – 2023 Canadian Swimming Trials
5. Ariarne Titmus (AUS), 3:56.40 – 2022 Australian Nationals

On Sunday, McIntosh took a run at Ledecky's world record in the 800 free, finishing in a time of 8:05.07 to mark the third-fastest swim in history and knock nearly five seconds off her own Canadian Record of 8:09.86.

McIntosh was already the #2 performer of all-time behind Ledecky, but now moves within one second of the American legend's world record, and McIntosh was only 28 one-hundredths shy of Ledecky's former record of 8:04.79, which stood for nearly nine years before Ledecky brought the record down to 8:04.12 last month.

All-Time Performances, Women's 800 Freestyle (LCM)

1. Katie Ledecky (USA), 8:04.12 – 2025 Pro Swim Series - Fort Lauderdale
2. Katie Ledecky (USA), 8:04.79 – 2016 Olympic Games
3. Summer McIntosh (CAN), 8:05.07 – 2025 Canadian Swimming Trials
4. Katie Ledecky (USA), 8:05.76 – 2025 U.S. National Championships
5. Katie Ledecky (USA), 8:06.68 – 2016 Pro Swim Series - Austin

McIntosh kept the ball rolling on Monday, taking direct aim at Katinka Hosszu's decade-old world record of 2:06.12 in the women's 200 IM and delivering. McIntosh clocked 2:05.70 to slash 42 one-hundredths off Hosszu's record from the 2015 World Championships, becoming the first swimmer under the 2:06 barrier while knocking off her Canadian Record of 2:06.56 by nearly nine tenths of a second.

All-Time Performances, Women's 200 IM (LCM)

1. Summer McIntosh (CAN), 2:05.70 – 2025 Canadian Swimming Trials
2. Katinka Hosszu (HUN), 2:06.12 – 2015 World Championships
3. Ariana Kukors (USA), 2:06.15 – 2009 World Championships
4. Summer McIntosh (CAN), 2:06.56 – 2024 Olympic Games
5. Katinka Hosszu (HUN), 2:06.58 – 2016 Olympic Games

McIntosh now owns the long course world record in three events, adding the 400 free and 200 IM marks to the 400 IM record she's had ownership of for the past two years.

Through the first three nights of the Canadian Swimming Trials, eight women (including McIntosh) and four men have qualified for the World Championship team under Priority 1, while an additional five swimmers, including Penny Oleksiak, are in position to be named to the roster under Priority 3.

The competition will continue through Thursday, June 12. You can follow along with full coverage here.

Walsh, Ledecky Shine At Nationals As USA Swimming Announces Worlds Roster

The 2025 U.S. National Championships came to a close on Saturday with USA Swimming announcing a finalized 47-swimmer roster for this summer's World Championships in Singapore.

Women's Highlights

Gretchen Walsh and Katie Ledecky highlighted the action by winning three events apiece, with Walsh breaking the American Record in the women's 50 fly (24.66), tying the National Record in the 50 free (23.91), and dropping the second-fastest swim ever in the 100 fly (54.76).

Walsh was also 2nd in the women's 100 free, setting a lifetime best of 52.78 with Torri Huske claiming the victory in a U.S. Open Record of 52.43.

Huske was also the runner-up to Walsh in the 50 free (23.98) and 100 fly (56.61), and after finishing 3rd in the 200 free behind Claire Weinstein and Ledecky in a lifetime best of 1:55.71, was slotted into an individual berth at Worlds with Ledecky dropping it from her individual schedule.

That gives Huske four individual events in Singapore, tying her with Walsh and Regan Smith for the most on the U.S. team.

Smith was victorious in the women's 100 back (57.69) and also placed 2nd in the 50 back, 200 back and 200 fly to earn four World Championship entries.

Ledecky swept the women's 400 free (3:58.56), 800 free (8:05.76) and 1500 free (15:36.76), with her swim in the 800 free marking a new Championship Record and marking the fourth-fastest swim ever (it was #3 at the time, prior to McIntosh going 8:05.07 at the Canadian Trials).

In addition to Walsh in the 50 fly, Katharine Berkoff also set a new American Record in Indianapolis, doing so in the women's 50 back, as she became the third woman in history under 27 seconds in 26.97, lowering Smith's National Record of 27.10 to rank her #2 all-time.

Another standout on the women's side was Weinstein, as the 18-year-old won the 200 free (1:54.92) and was the runner-up to Ledecky in the 400 free (4:00.05), 800 free (8:19.67) and 1500 free (16:01.96), setting personal best times across the board. She also set a PB in the 100 free (53.72), placing 8th.

Those swims rank Weinstein 5th in the 100 free, 3rd in the 200 free, 2nd in the 400 free, 4th in the 800 free and 6th in the 1500 free all-time in the U.S. girls' 17-18 age group.

That gave Weinstein four events on her Worlds schedule, but she dropped the 1500 free, which opened the door for Jillian Cox to add it to her lineup after placing 3rd.

Men's Highlights

Four swimmers claimed multiple victories on the men's side, highlighted by Bobby Finke winning the 800 free (7:43.13), 1500 free (14:48.65) and 400 IM (4:07.46), with the latter swim marking a big best time and moving him into the top 10 all-time.

Finke ultimately dropped the 400 IM from his World Championship program due to a scheduling conflict with the 1500 free in Singapore, which opened the door for Rex Maurer to add the event to his lineup after placing 3rd.

Maurer also won the 400 free in a U.S. Open Record of 3:43.33, and qualified for the 4x200 free relay by taking 3rd in the 200 free (1:45.13).

Placing 2nd in the 400 IM behind Finke was Carson Foster, who booked his ticket to Worlds in three individual events with additional runner-up finishes in the 200 fly (1:53.70) behind Luca Urlando (1:53.42) and in the 200 IM (1:55.76) behind Shaine Casas (1:55.73).

Casas was another male swimmer to qualify in three events, adding a win in the 100 fly (50.51) and a runner-up finish in the 50 back (24.44) to his 200 IM victory.

Joining Finke and Casas in winning multiple national titles in Indianapolis were freestyle sprinter Jack Alexy and up-and-coming breaststroker Campbell McKean.

Alexy, who opened the meet by becoming just the sixth man under 47 seconds in the prelims of the 100 free (46.99), won the final in 47.17 and went on to add a second victory in the 50 free, setting a personal best of 21.36 to rank 2nd all-time among American swimmers. Midway through the meet, Alexy swam the 50 free in a time trial, setting what was a personal best at the time of 21.49.

McKean, 18, first won the men's 50 breast in a time of 26.90, qualifying him for the Worlds team, and then he followed up with a stunning swim in the final of the 100 breast, clocking 58.96 to obliterate the boys' 17-18 National Age Group Record of 59.82 while breaking the 1:00 barrier for the first time. It also made him the fastest 18 & under swimmer ever by birthday, not birth year, as he'll turn 19 later this year.

Also qualifying for the Worlds team and resetting NAG records in Indianapolis was 16-year-old standout Luka Mijatovic, who took down the boys' 15-16 records in the 200 free (1:45.92) and 400 free (3:45.71), going under the existing 17-18 records in both. He finished 8th in the 200 free final, but snagged a runner-up finish in the 400 free final to qualify for Worlds.

In that 400 free final, 18-year-old Ryan Erisman placed 3rd in 3:46.01, breaking Larsen Jensen's 17-18 NAG record of 3:46.08 from the 2004 Olympics.

Also lowering a 17-18 NAG record was Thomas Heilman, who twice took down his own mark in the 100 fly, clocking 50.78 in the prelims to lower the 50.80 standard he established at the 2024 Olympic Trials. Heilman then placed 2nd in the final in 50.70.

Another noteworthy performance on the men's side came from Luke Hobson in the 200 free, as the Texas Longhorn became just the second American in history to break 1:44 in a time of 1:43.73, ranking him #5 all-time and breaking Michael Phelps' U.S. Open Record of 1:44.10 from 2008. Phelps owns the American Record at 1:42.96.

You can find the full U.S. roster for the 2025 World Championships here.

You can also find SwimSwam's projected rosters for the U.S. at the World University Games and the World Junior Championships here.

McKeown Avoids DQ, Opens Aussie Trials With Pair of Backstroke Wins

After initially being disqualified for a false start in the prelims of the women's 50 back, Kaylee McKeown won her appeal and went on to win the final on the opening night of the Australian Swimming Trials, clocking 27.33 to book her ticket to the World Championships (she was 27.27 in the prelims).

McKeown followed up by comfortably winning the 100 back in 57.71, while Mollie O'Callaghan was the runner-up in both races (27.39/58.85) to qualify for Singapore as well.

Other highlights from the first two days of racing include Lani Pallister joining the sub-4:00 club in the women's 400 free (3:59.72), Sienna Toohey breaking her own 16-year-old age record in the women's 100 breast (1:06.55), and Sam Short returning from an injury plagued 2024 with a victory in the men's 400 free (3:41.03) and a runner-up finish behind Edward Sommerville (1:44.93) in the 200 free (1:45.71).

Find full coverage of the Australian Trials here.

QUICK HITS

• Judge Claudia Wilken granted final approval to the settlement in the landmark House v. NCAA case on Friday, bringing in a new revenue-sharing cap to college sports beginning next season while introducing roster limits, though schools can opt to grandfather in the rules relating to the latter. Read more here.
• Keller High School was reprimanded publicly and will be implementing numerous changes next season following an investigation into alleged rule violations by the swim & dive team last season. The team will keep their UIL 6A boys' and girls' state titles from last season.
• Cal State Bakersfield head coach Chris Hansen has retired after being put on administrative leave earlier this year. He led the Roadrunners' swim & dive program for 17 seasons.
• Don Oberhelman will retire after serving as the Cal Poly Athletic Director for 15 years. With Oberhelman retiring, the group that has come together to try and save the school's swim & dive program maintains hope that it can be revived, with school President Jeffrey D. Armstrong set to make a decision within the next seven days.
• Former University of Minnesota and SMU diver Jaclynn Fowler has received a four-year suspension after testing positive for the banned substance amphetamine.

Summer McIntosh Shatters 10-Year-Old 200 IM World Record in 2:05.70

Summer McIntosh Swims 3:54.18 To Shatter 400 Freestyle World Record By 1.2 Seconds

USA Swimming Releases Finalized Roster For 2025 World Championships

Judge Approves House v NCAA Settlement; Roster Limit Grandfathering Allowed But Not Required

Cal Poly AD Don Oberhelman Retires After Cutting Swimming & Diving Program

Luka Does It Again: Mijatovic Throws Down 3:45.89 400 Free For 15-16 NAG, Under 17-18 Record

Update: WR Holder in 50 Back, Kaylee McKeown, Initially False Started but Now Reinstated