Seojoon Lee

Mage 12MIUSSC

280 plausible swims · 34 meets · 2024-05-18 → 2026-07-11

Personal records

Event	Course	Best	Cut	Date	Meet
50 Freestyle	SCY	28.89	BB+0.80s to A·+6.30s to Sectionals	2026-06-14	2026 USSC Stoney Summer Spectacular venue
100 Freestyle	SCY	1:00.32	A+1.53s to AA·+11.33s to Sectionals	2026-01-16	2026 Odd Age Classic
200 Freestyle	SCY	2:09.08	A+0.89s to AA·+21.59s to Sectionals	2026-05-30	2026 CW Short Course Flashback
500 Freestyle	SCY	5:57.15	A+12.16s to AA·+64.26s to Sectionals	2026-03-21	2026 SCY MAGS Championship Meet fast pool
1000 Freestyle	SCY	12:39.13	BB+1.84s to A·+150.64s to Sectionals	2026-01-17	2026 Odd Age Classic venue
25 Backstroke	SCY	22.40		2025-06-07	USSC Summer Spectacular
50 Backstroke	SCY	30.82	AA+1.13s to AAA·+6.33s to Sectionals	2025-03-01	2025 10 & Under Championship Meet
100 Backstroke	SCY	1:13.01	BB+3.72s to A·+16.92s to Sectionals	2026-02-08	2026 Michigan Open venue
200 Backstroke	SCY	2:01.95	AAAA·+0.56s to Sectionals	2026-06-13	2026 USSC Stoney Summer Spectacular
50 Breaststroke	SCY	37.00	BB+0.31s to A·+9.81s to Sectionals	2026-03-01	2026 Junior Cup venue
100 Breaststroke	SCY	1:11.69	AA+0.30s to AAA·+8.10s to Sectionals	2026-03-20	2026 SCY MAGS Championship Meet
200 Breaststroke	SCY	2:35.46	AA+1.07s to AAA·+16.87s to Sectionals	2025-10-31	2025 Holland Fall Invite
50 Butterfly	SCY	28.97	AA+0.78s to AAA·+5.28s to Sectionals	2024-07-12	USSC July Last Chance
100 Butterfly	SCY	1:11.42	BB+2.13s to A·+17.43s to Sectionals	2026-03-01	2026 Junior Cup venue
200 Butterfly	SCY	2:41.13	BB+9.64s to A·+38.34s to Sectionals	2026-07-11	2026 USSC July Last Chance venue
100 Individual Medley	SCY	1:10.80	BB+0.81s to A	2024-10-18	2024 Grab Bag Classic
200 Individual Medley	SCY	2:27.51	A+1.92s to AA·+26.52s to Sectionals	2025-05-17	2025 USSC Spring Into Summer
400 Individual Medley	SCY	5:28.58	BB+5.09s to A·+64.59s to Sectionals	2026-03-22	2026 SCY MAGS Championship Meet fast pool
50 Freestyle	LCM	32.00	A+1.21s to AA·+6.01s to Sectionals	2026-05-17	2026 CW Mega May Showers venue
100 Freestyle	LCM	1:16.72	B+0.53s to BB·+20.13s to Sectionals	2025-06-28	2025 USSC June Invite venue
200 Freestyle	LCM	2:30.36	A+3.17s to AA·+26.87s to Sectionals	2026-06-27	2026 Eric Namesnik Memorial Invite venue
400 Freestyle	LCM	5:17.46	A+4.37s to AA·+55.27s to Sectionals	2026-06-26	2026 Eric Namesnik Memorial Invite venue
50 Backstroke	LCM	41.94	B+0.75s to BB·+13.25s to Sectionals	2025-06-28	2025 USSC June Invite venue
100 Backstroke	LCM	1:10.85	AAA+0.46s to AAAA·+6.46s to Sectionals	2026-06-26	2026 Eric Namesnik Memorial Invite
200 Backstroke	LCM	2:55.48	BB+1.49s to A·+35.69s to Sectionals	2026-06-26	2026 Eric Namesnik Memorial Invite venue
50 Breaststroke	LCM	43.54	BB+1.55s to A·+11.55s to Sectionals	2026-05-16	2026 CW Mega May Showers venue
100 Breaststroke	LCM	1:36.51	BB+5.22s to A·+23.72s to Sectionals	2026-05-17	2026 CW Mega May Showers venue
200 Breaststroke	LCM	3:21.77	BB+6.38s to A·+41.98s to Sectionals	2026-06-26	2026 Eric Namesnik Memorial Invite venue
50 Butterfly	LCM	35.22	A+1.63s to AA·+7.83s to Sectionals	2026-05-16	2026 CW Mega May Showers venue
100 Butterfly	LCM	1:23.78	BB+4.29s to A·+22.29s to Sectionals	2026-05-17	2026 CW Mega May Showers venue
200 Individual Medley	LCM	2:59.94	BB+5.75s to A·+40.55s to Sectionals	2026-05-16	2026 CW Mega May Showers venue
400 Individual Medley	LCM	6:09.11	A+9.42s to AA·+67.22s to Sectionals	2026-06-27	2026 Eric Namesnik Memorial Invite venue

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 12.

National cuts (Sectionals → Nationals) are the current-season meet qualifying times for the swimmer's zone and age group; ✓ marks the hardest cut already achieved.

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	28.56	flying	200 Free Relay (leg 3)	2026-03-22	2026 SCY MAGS Championship Meet
100 Freestyle	SCY	1:01.75	flying	400 Free Relay (leg 3)	2026-03-20	2026 SCY MAGS Championship Meet
50 Backstroke	SCY	36.12	flat	200 Medley Relay	2025-03-02	2025 10 & Under Championship Meet
50 Freestyle	LCM	40.18	flying	200 Free Relay (leg 2)	2024-07-21	2024 MAGS Long Course Championship Meet
50 Backstroke	LCM	42.17	flat	200 Medley Relay	2024-07-20	2024 MAGS Long Course Championship Meet

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 11-12 · LCM

3373 points (5/5 events)

Event	Time	Points
400 FR LCM	5:17.46	730
100 BK LCM	1:10.85	980
100 BR LCM	1:36.51	548
100 FL LCM	1:23.78	529
200 IM LCM	2:59.94	586

IMR 11-12 · SCY

3548 points (5/5 events)

Event	Time	Points
200 FR SCY	2:09.08	744
50 BK SCY	30.82	765
50 BR SCY	37.00	616
50 FL SCY	28.97	781
100 IM SCY	1:10.80	642

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

PR splits

500 Freestyle SCY 5:57.15

31.18

35.03

35.99

36.32

36.60

36.76

36.88

36.82

36.55

35.02

Front half 175.12s · back half 182.03s

1000 Freestyle SCY 12:39.13

34.65

38.04

37.55

38.39

38.65

39.21

38.22

38.87

38.41

39.09

38.09

38.37

38.40

38.24

38.32

38.13

38.03

38.23

37.38

34.86

Front half 381.08s · back half 378.05s

100 Backstroke SCY 1:13.01

35.76

37.25

Front half 35.76s · back half 37.25s

100 Butterfly SCY 1:11.42

33.85

37.57

Front half 33.85s · back half 37.57s

200 Butterfly SCY 2:41.13

37.00

40.19

42.03

41.91

Front half 77.19s · back half 83.94s

400 Individual Medley SCY 5:28.58

35.56

41.54

41.05

41.32

48.07

48.44

36.60

36.00

Front half 159.47s · back half 169.11s

100 Freestyle LCM 1:16.72

37.19

39.53

Front half 37.19s · back half 39.53s

200 Freestyle LCM 2:30.36

33.95

38.58

40.08

37.75

Front half 72.53s · back half 77.83s

400 Freestyle LCM 5:17.46

35.29

40.14

40.65

40.66

40.56

41.47

40.13

38.56

Front half 156.74s · back half 160.72s

200 Backstroke LCM 2:55.48

42.61

44.97

45.27

42.63

Front half 87.58s · back half 87.90s

100 Breaststroke LCM 1:36.51

46.09

50.42

Front half 46.09s · back half 50.42s

200 Breaststroke LCM 3:21.77

46.58

51.25

52.71

51.23

Front half 97.83s · back half 103.94s

200 Individual Medley LCM 2:59.94

39.32

47.59

53.34

39.69

Front half 86.91s · back half 93.03s

400 Individual Medley LCM 6:09.11

40.20

46.98

47.36

49.21

51.17

53.34

40.94

39.91

Front half 183.75s · back half 185.36s

Progression

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

50 Freestyle SCY 28.89 22 swims

100 Freestyle SCY 1:00.32 21 swims

200 Freestyle SCY 2:09.08 18 swims

500 Freestyle SCY 5:57.15 8 swims

1000 Freestyle SCY 12:39.13 1 swim

25 Backstroke SCY 22.40 2 swims

50 Backstroke SCY 30.82 27 swims

100 Backstroke SCY 1:13.01 20 swims

200 Backstroke SCY 2:01.95 6 swims

50 Breaststroke SCY 37.00 19 swims

100 Breaststroke SCY 1:11.69 25 swims

200 Breaststroke SCY 2:35.46 7 swims

50 Butterfly SCY 28.97 9 swims

100 Butterfly SCY 1:11.42 12 swims

200 Butterfly SCY 2:41.13 7 swims

100 Individual Medley SCY 1:10.80 18 swims

200 Individual Medley SCY 2:27.51 12 swims

400 Individual Medley SCY 5:28.58 1 swim

50 Freestyle LCM 32.00 3 swims

100 Freestyle LCM 1:16.72 2 swims

200 Freestyle LCM 2:30.36 3 swims

400 Freestyle LCM 5:17.46 1 swim

50 Backstroke LCM 41.94 4 swims

100 Backstroke LCM 1:10.85 7 swims

200 Backstroke LCM 2:55.48 3 swims

50 Breaststroke LCM 43.54 4 swims

100 Breaststroke LCM 1:36.51 7 swims

200 Breaststroke LCM 3:21.77 2 swims

50 Butterfly LCM 35.22 1 swim

100 Butterfly LCM 1:23.78 1 swim

200 Individual Medley LCM 2:59.94 5 swims

400 Individual Medley LCM 6:09.11 2 swims