Career Accolades
- 23-time All-American: 200 IM (2025 - fifth; 2024 - 12th; 2023- fifth; 2022- ninth), 400 IM (2022- 12th), 100 breast (2025 - fifth; 2024 - eighth; 2023- 11th), 200 breast (2025 - 12th), 400 free relay (2023- eighth; 2022- eighth), 800 free relay (2025 - fifth; 2024 - eighth; 2023- seventh; 2022- third), 200 medley relay (2025 - ninth; 2024 - seventh; 2023- 10th; 2022- eighth), 400 medley relay (2025 - seventh; 2024 - fifth; 2023- 11th; 2022- sixth)
- Two-time Pac-12 Champion (2022, 200 medley relay- 2022, 400 medley relay- 2022)
- Two-time Olympian: Israel (2020, 2024)
- Five-time Stanford record holder
- Two-time All-ACC
- Three-time first-team Academic All-American (2023, 2024, 2025)
- Three-time CSCAA Scholar All-American (2022, 2023, 2024)
- Academic All-District
- ACC All-Academic
- Two-time Pac-12 Academic Honor Roll (2023, 2024)
- Avery Aquatic Center record-holder in the 100 breast (51.39)
- Three-time Israeli record holder
- Stanford Athletics Board Block 'S' Outstanding Junior
As a Senior (2024-25)
- Six-time All-American
- All-America First Team (100 breaststroke, 200 individual medley, 800 free relay, 400 medley relay)
- All-America Second Team (200 breaststroke, 200 medley relay)
- Broke five Stanford records at NCAA Championships (100 breast, 200 breast, 800 FR, 200 MR, 400 MR)
- Individual NCAA finishes: fifth in 100 breast (50.60), fifth in 200 IM (1:39.84), 12th in 200 breast (1:50.95)
- Relays at NCAA's: fifth in 800 FR (6:06.69), seventh in 400 MR (3:00.91), ninth in 200 MR (1:22.23)
- All-ACC (100 breaststroke, 200 individual medley)
- Individual ACC finishes: second in 100 breast (50.99), third in 200 IM (1:41.82), 13th in 200 breast (1:53.85)
- Relays at ACC's: second in 800 FR (6:08.70), fourth in 200 MR (1:22.74), fifth in 400 MR (3:03.31)
- At season's end in Stanford's all-time Top 15: No. 1 in 100 breast, No. 1 in 200 breast, No. 2 in 200 IM, No. 3 in 400 IM, No. 9 in 200 free
- ACC Swimmer of the Week (Oct. 22)
- Academic All-American First Team
- Academic All-District
- ACC All-Academic
As a Junior (2023-24)
- Five-time All-American
- Four-time first-team All-American (100 breast, 800 free relay, 200 medley relay, 400 medley relay)
- Set school record in the 100 breast (50.87) in NCAA Championships prelims
- At NCAA Championships: eighth in 100 breast (51.25), 12th in 200 IM (1:42.28), 19th in 200 breast (1:53.41), fifth in 400 medley relay (3:01.97), seventh in 200 medley relay (1:22.43), eighth in 800 free relay (6:08.77)
- At Pac-12 Championships: Second in 100 breast (50.87), fourth in 200 breast (1:52.27), ninth in 200 IM (1:41.25), second in 400 medley relay (3:03.55), third in 400 free relay (2:48.62), third in 200 medley relay (1:23.14)
- First-team Academic All-American
- CSCAA Scholar All-American
- Pac-12 Academic Honor Roll
- Stanford Athletics Board Block 'S' Outstanding Junior
As a Sophomore (2022-23)
- Six-time All-American: 200 IM (fifth, 1:40.62), 100 breast (11th, 51.41) 400 IM (12th, 3:40.41), 400 free relay (eighth, 2:47.61), 800 free relay (seventh, 6:11.49), 200 medley relay (10th, 1:22.69), 400 medley relay (11th, 3:03.61)
- CSC Academic All-American First Team
- Pac-12 Academic Honor Roll
- CSCAA Scholar All-American
- Set the Stanford record in the 100 breast at the NCAA Championships (51.41)
- Also competed in the 200 breast at NCAA Championships (36th, 1:55.26)
- Reached the podium at the Pac-12 Championships in the 800 free relay (third, 6:11.08), 200 IM (third, 1:40.42), 400 medley relay (3:02.71)
- Also scored points in the Pac-12 Championships in the 400 IM (sixth, 3:40.97) and 200 breast (seventh, 1:53.53)
- Claimed six individual titles during the dual meet season, two in the 200 fly, two in the 200 IM, one in the 100 breast, and one in the 200 breast
As a Freshman (2021-22)
- Six-time All-American: 200 IM (ninth, 1:39.96), 400 IM (12th, 3:40.41), 400 free relay (eighth, 2:48.21), 800 free relay (third, 6:06.83), 200 medley relay (eighth, 1:22.41), 400 medley relay (sixth, 3:01.70)
- Two-time Pac-12 Champion (200 medley relay- 1:22.74; 400 medley relay- 3:01.45)
- CSCAA Scholar All-American
- Also competed in the 200 breast at NCAA Championships (18th, 1:52.91)
- Also reached the podium at the Pac-12 Championships in the 200 IM (third, 1:40.71), 400 free relay (third, 2:47.17), and 800 free relay (second, 6:08.73), also scored points in the 400 IM (fourth, 3:39.49), and 200 breast (sixth, 1:51.73)
- Set the Stanford record in the 400 free relay (2:47.17)
- Set the Stanford record in the 800 free relay (6:06.83)
- Set the Stanford record in the 200 medley relay (1:22.41)
- Set the Stanford record in the 400 medley relay (3:01.45)
International/National
- 2020 and 2024 Olympian for Israel
- In 2024 Paris Games: 12th in 200m IM (1:58.89), 16th in 100 breast (1:00.37), 10th in 400 mixed relay (3:45.33)
- In 2020 Tokyo Games: 26th in 200 IM (1:58.95), 27th in 200 breast (2:12.71), 27th in 400 IM (4:21.50)
- Second in the 200 IM in the 2024 European Championships, setting an Israeli record of 1:57.01 in the semifinals.
- Through 2024, holds Israeli records in 100m breast (59.63), 200 IM (1:57.01), 400 free relay (3:14.03)
Personal
- Sister, Leah, was a 2024 Olympic swimmer for Israel
- Through 2024, Leah holds Israeli records in the 200m fly (2:10.80), 400 free relay (3:41.13), 800 free relay (7:51.83), and 400 medley relay (4:03.28)
- Leah swims for Cal
- Parents are Oleg and Anna Polonsky
- Besides Leah, other siblings are Libi and Jonathan