Joonsoo Kwon

Mage 10MAMDCAANBAC

299 plausible swims · 55 meets · 2022-10-08 → 2026-06-11

Personal records

Event	Course	Best	Cut	Date	Meet
25 Freestyle	SCY	17.53		2024-03-23	2024 Maryland 8 & Under Championship Meet venue
50 Freestyle	SCY	29.93	AA+1.14s to AAA	2026-03-08	2026 MD LSC 14 & U Championships venue
100 Freestyle	SCY	1:03.94	AAA+2.85s to AAAA	2026-03-05	2025 Speedo MD LSC Senior Champs
200 Freestyle	SCY	2:18.76	AAA+5.97s to AAAA	2026-03-05	2025 Speedo MD LSC Senior Champs
500 Freestyle	SCY	6:01.56	AAA+8.37s to AAAA	2026-03-05	2025 Speedo MD LSC Senior Champs
25 Backstroke	SCY	22.84		2024-02-18	2024 EST/CAA/LBA/NAAC Mini Meet slow pool
50 Backstroke	SCY	37.42	A+1.43s to AA	2026-02-01	YY John deBarbadillo Invite
100 Backstroke	SCY	1:16.22	AA+3.43s to AAA	2026-03-08	2026 MD LSC 14 & U Championships venue
200 Backstroke	SCY	2:45.48		2026-02-01	YY John deBarbadillo Invite
25 Breaststroke	SCY	28.99		2023-03-25	2023 Maryland 8 & Under Championship Meet venue
50 Breaststroke	SCY	39.34	AA+1.05s to AAA	2026-03-05	2025 Speedo MD LSC Senior Champs
100 Breaststroke	SCY	1:34.78	BB+3.09s to A	2025-11-14	2025 NBAC Thanksgiving Meet
200 Breaststroke	SCY	3:04.40		2026-02-01	YY John deBarbadillo Invite
25 Butterfly	SCY	24.84		2023-11-05	2023 Bridget Vache Memorial MAC Fall Frenzy slow pool
50 Butterfly	SCY	35.27	A+0.98s to AA	2025-12-12	2025 NBAC 51st Annual Christmas Invitational venue
100 Butterfly	SCY	1:13.02	AAA+3.03s to AAAA	2026-03-05	2025 Speedo MD LSC Senior Champs
100 Individual Medley	SCY	1:13.41	AA+0.22s to AAA	2026-03-05	2025 Speedo MD LSC Senior Champs
200 Individual Medley	SCY	2:35.64	AAA+4.75s to AAAA	2026-03-05	2025 Speedo MD LSC Senior Champs
50 Freestyle	LCM	34.10	AA+1.11s to AAA	2026-05-09	2026 NBAC Spring LC Invitational Meet venue
100 Freestyle	LCM	1:13.40	AA+0.11s to AAA	2026-06-08	Chargers Mid Season Long Course Invitational
200 Freestyle	LCM	2:36.75	AAA+4.76s to AAAA	2026-06-08	Chargers Mid Season Long Course Invitational
400 Freestyle	LCM	5:24.94	AAA+3.65s to AAAA	2026-05-08	2026 NBAC Spring LC Invitational Meet venue
50 Backstroke	LCM	40.75	AA+1.76s to AAA	2026-06-08	Chargers Mid Season Long Course Invitational
100 Backstroke	LCM	1:25.92	AA+1.83s to AAA	2026-04-18	2026 EST Spring Into Long Course
200 Backstroke	LCM	3:09.27		2026-06-08	Chargers Mid Season Long Course Invitational
50 Breaststroke	LCM	46.23	A+0.44s to AA	2026-05-10	2026 NBAC Spring LC Invitational Meet venue
100 Breaststroke	LCM	1:37.35	AA+0.86s to AAA	2026-05-09	2026 NBAC Spring LC Invitational Meet venue
200 Breaststroke	LCM	3:27.17		2026-06-08	Chargers Mid Season Long Course Invitational
50 Butterfly	LCM	38.74	A+0.15s to AA	2026-05-10	2026 NBAC Spring LC Invitational Meet venue
100 Butterfly	LCM	1:23.88	AAA+4.29s to AAAA	2026-05-09	2026 NBAC Spring LC Invitational Meet venue
200 Individual Medley	LCM	2:55.87	AAA+3.38s to AAAA	2026-05-10	2026 NBAC Spring LC Invitational Meet venue
400 Individual Medley	LCM	6:05.36		2026-06-08	Chargers Mid Season Long Course Invitational

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 10.

Pool tags are a venue speed heuristic (median deviation of all swims there vs each swimmer's typical time) — see the venue page for the method.

Fastest relay legs

Leg	Course	Time	Start	Relay	Date	Meet
50 Freestyle	SCY	29.81	flying	200 Medley Relay (leg 4)	2026-03-05	2026 MD LSC 14 & U Championships
50 Freestyle	SCY	29.17	flying	200 Free Relay (leg 4)	2026-03-07	2026 MD LSC 14 & U Championships
100 Freestyle	SCY	1:03.32	flying	400 Free Relay (leg 4)	2026-03-08	2026 MD LSC 14 & U Championships
100 Freestyle	SCY	1:04.85	flying	400 Medley Relay (leg 4)	2026-03-06	2026 MD LSC 14 & U Championships
50 Butterfly	SCY	44.94	flying	200 Medley Relay (leg 3)	2025-03-16	2025 Speedo Maryland Junior Championship - Si

Reconstructed from relay split marks. Flat = lead-off (comparable to individual times); flying starts run ~0.5–0.7s fast and are not PRs.

IMX / IMR

IMX 10 & under · LCM

4339 points (5/5 events)

Event	Time	Points
200 FR LCM	2:36.75	906
100 BK LCM	1:25.92	806
100 BR LCM	1:37.35	835
100 FL LCM	1:23.88	854
200 IM LCM	2:55.87	938

IMR 10 & under · LCM

3984 points (5/5 events)

Event	Time	Points
100 FR LCM	1:13.40	859
50 BK LCM	40.75	747
50 BR LCM	46.23	722
50 FL LCM	38.74	718
200 IM LCM	2:55.87	938

Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.

PR splits

100 Backstroke SCY 1:16.22

38.00

38.22

Front half 38.00s · back half 38.22s

200 Backstroke SCY 2:45.48

38.99

41.28

42.71

42.50

Front half 80.27s · back half 85.21s

100 Breaststroke SCY 1:34.78

46.06

48.72

Front half 46.06s · back half 48.72s

200 Breaststroke SCY 3:04.40

42.52

47.14

48.75

45.99

Front half 89.66s · back half 94.74s

100 Freestyle LCM 1:13.40 split/total mismatch

35.76

1.88

Front half 35.76s · back half 37.64s

200 Freestyle LCM 2:36.75 split/total mismatch

36.20

40.99

41.09

38.47

400 Freestyle LCM 5:24.94

36.96

40.29

42.27

42.06

42.19

41.40

40.78

38.99

Front half 161.58s · back half 163.36s

100 Backstroke LCM 1:25.92 split/total mismatch

42.37

1.18

Front half 42.37s · back half 43.55s

200 Backstroke LCM 3:09.27 split/total mismatch

45.32

48.69

48.47

46.79

100 Breaststroke LCM 1:37.35

46.90

50.45

Front half 46.90s · back half 50.45s

200 Breaststroke LCM 3:27.17 split/total mismatch

47.89

54.24

53.39

51.65

100 Butterfly LCM 1:23.88

39.82

44.06

Front half 39.82s · back half 44.06s

200 Individual Medley LCM 2:55.87

39.98

45.52

53.87

36.50

Front half 85.50s · back half 90.37s

400 Individual Medley LCM 6:05.36 split/total mismatch

39.98

43.30

48.82

47.24

52.70

53.72

41.27

38.33

Reaction time

fastest 0.51s average 0.510s slowest 0.51s 1 electronic start

From electronically-timed starts only (~2% of corpus swims carry a reaction time). PRs with a recorded reaction show an RT chip in the splits section above.

Progression

Faster times are higher. One card per event, all courses & history.

25 Freestyle SCY 17.53 9 swims

50 Freestyle SCY 29.93 28 swims

100 Freestyle SCY 1:03.94 24 swims

200 Freestyle SCY 2:18.76 12 swims

500 Freestyle SCY 6:01.56 6 swims

25 Backstroke SCY 22.84 7 swims

50 Backstroke SCY 37.42 14 swims

100 Backstroke SCY 1:16.22 10 swims

200 Backstroke SCY 2:45.48 7 swims

25 Breaststroke SCY 28.99 4 swims

50 Breaststroke SCY 39.34 8 swims

100 Breaststroke SCY 1:34.78 9 swims

200 Breaststroke SCY 3:04.40 3 swims

25 Butterfly SCY 24.84 4 swims

50 Butterfly SCY 35.27 15 swims

100 Butterfly SCY 1:13.02 13 swims

100 Individual Medley SCY 1:13.41 14 swims

200 Individual Medley SCY 2:35.64 13 swims

50 Freestyle LCM 34.10 6 swims

100 Freestyle LCM 1:13.40 13 swims

200 Freestyle LCM 2:36.75 11 swims

400 Freestyle LCM 5:24.94 7 swims

50 Backstroke LCM 40.75 12 swims

100 Backstroke LCM 1:25.92 13 swims

200 Backstroke LCM 3:09.27 2 swims

50 Breaststroke LCM 46.23 6 swims

100 Breaststroke LCM 1:37.35 7 swims

200 Breaststroke LCM 3:27.17 2 swims

50 Butterfly LCM 38.74 8 swims

100 Butterfly LCM 1:23.88 1 swim

200 Individual Medley LCM 2:55.87 9 swims

400 Individual Medley LCM 6:05.36 2 swims