William Choi

Mage 16CAMPMRUN$UN-1UN01

126 plausible swims · 21 meets · 2024-07-13 → 2026-06-14

Personal records

Event	Course	Best	Cut	Date	Meet
50 Freestyle	SCY	23.61	A+0.22s to AA	2025-10-11	2025 CA Cerritos SC Swim Meet venue
100 Freestyle	SCY	51.87	A+0.58s to AA	2026-02-14	2026 Metro Champs @ La Mirada Armada venue
200 Freestyle	SCY	1:50.42	AA+3.33s to AAA	2025-12-13	2025 CA SCS/RAA WAG venue
500 Freestyle	SCY	5:04.52	A+0.23s to AA	2025-09-14	2025 DARE Launch & Lunge Season Opener venue
100 Backstroke	SCY	1:03.28	B+0.39s to BB	2024-07-13	2024 Metro Champs @LKWD venue
200 Backstroke	SCY	2:19.48	B+1.59s to BB	2024-11-10	2024 Downey Dolphins SC Meet venue
100 Breaststroke	SCY	1:03.98	A+0.79s to AA	2024-12-13	2024 CA GWSC/SCS WAG venue
200 Breaststroke	SCY	2:23.00	A+5.71s to AA	2024-12-15	2024 CA GWSC/SCS WAG venue
100 Butterfly	SCY	54.55	AA+1.66s to AAA	2025-12-13	2025 CA SCS/RAA WAG venue
200 Butterfly	SCY	2:02.81	AA+4.42s to AAA	2025-12-14	2025 CA SCS/RAA WAG venue
200 Individual Medley	SCY	2:05.58	A+1.29s to AA	2024-12-14	2024 CA GWSC/SCS WAG venue
400 Individual Medley	SCY	4:27.61	A+1.52s to AA	2024-12-13	2024 CA GWSC/SCS WAG venue
50 Freestyle	LCM	27.48	A+0.39s to AA	2024-07-28	2024 CA SCS/ BREA Summer A/G Champs slow pool
100 Freestyle	LCM	59.15	A+0.16s to AA	2025-07-12	2025 Metro Committee Summer Championships venue
200 Freestyle	LCM	2:07.70	AA+4.11s to AAA	2026-06-11	ARMADA-2026 SCS June AG Invite venue
400 Freestyle	LCM	4:44.70	A+9.01s to AA	2025-05-31	2025 CA Downey Dolphins Swim Team LC Meet slow pool
100 Breaststroke	LCM	1:16.63	A+2.84s to AA	2025-07-25	2025 CA SCS/RAA Summer A/G Champs venue
200 Breaststroke	LCM	2:47.91	BB+0.42s to A	2026-06-14	ARMADA-2026 SCS June AG Invite venue
100 Butterfly	LCM	1:02.28	AA+1.79s to AAA	2025-07-13	2025 Metro Committee Summer Championships venue
200 Butterfly	LCM	2:28.60	BB+0.91s to A	2025-07-24	2025 CA SCS/RAA Summer A/G Champs venue
200 Individual Medley	LCM	2:25.54	A+0.55s to AA	2025-06-13	2025 SCS June AG Invite @ La Mirada Armada venue
400 Individual Medley	LCM	5:13.04	A+4.05s to AA	2025-07-25	2025 CA SCS/RAA Summer A/G Champs venue

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 16.

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
100 Freestyle	LCM	59.38	flying	400 Free Relay (leg 3)	2025-07-12	2025 Metro Committee Summer Championships
50 Butterfly	LCM	26.71	flying	200 Medley Relay (leg 3)	2025-07-25	2025 CA SCS/RAA Summer A/G Champs
100 Butterfly	LCM	1:03.21	flying	400 Medley Relay (leg 3)	2025-07-13	2025 Metro Committee Summer Championships

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 15-16 · SCY

4156 points (6/6 events)

Event	Time	Points
500 FR SCY	5:04.52	746
200 BK SCY	2:19.48	499
200 BR SCY	2:23.00	672
200 FL SCY	2:02.81	772
200 IM SCY	2:05.58	732
400 IM SCY	4:27.61	735

IMR 15-16 · SCY

3555 points (5/5 events)

Event	Time	Points
200 FR SCY	1:50.42	788
100 BK SCY	1:03.28	514
100 BR SCY	1:03.98	733
100 FL SCY	54.55	788
200 IM SCY	2:05.58	732

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

PR splits

100 Freestyle SCY 51.87

24.51

27.36

Front half 24.51s · back half 27.36s

200 Freestyle SCY 1:50.42

24.89

27.45

28.49

29.59

Front half 52.34s · back half 58.08s

500 Freestyle SCY 5:04.52

25.87

29.51

30.23

31.16

31.90

32.03

30.62

32.69

30.78

29.73

Front half 148.67s · back half 155.85s

100 Backstroke SCY 1:03.28

30.31

32.97

Front half 30.31s · back half 32.97s

100 Breaststroke SCY 1:03.98

30.13

33.85

Front half 30.13s · back half 33.85s

200 Breaststroke SCY 2:23.00

32.28

35.86

37.28

37.58

Front half 68.14s · back half 74.86s

100 Butterfly SCY 54.55

25.42

29.13

Front half 25.42s · back half 29.13s

200 Butterfly SCY 2:02.81

26.98

30.75

32.39

32.69

Front half 57.73s · back half 65.08s

200 Individual Medley SCY 2:05.58

26.41

33.29

36.94

28.94

Front half 59.70s · back half 65.88s

400 Individual Medley SCY 4:27.61

27.16

31.84

35.81

34.90

37.50

38.59

31.27

30.54

Front half 129.71s · back half 137.90s

200 Freestyle LCM 2:07.70

61.98

65.72

Front half 61.98s · back half 65.72s

100 Breaststroke LCM 1:16.63

35.74

40.89

Front half 35.74s · back half 40.89s

200 Breaststroke LCM 2:47.91

79.29

88.62

Front half 79.29s · back half 88.62s

100 Butterfly LCM 1:02.28

29.02

33.26

Front half 29.02s · back half 33.26s

200 Butterfly LCM 2:28.60

28.92

36.34

40.86

42.48

Front half 65.26s · back half 83.34s

200 Individual Medley LCM 2:25.54

68.79

76.75

Front half 68.79s · back half 76.75s

400 Individual Medley LCM 5:13.04

29.58

36.66

43.03

42.58

45.07

45.89

35.50

34.73

Front half 151.85s · back half 161.19s

Reaction time

fastest 0.63s average 0.665s slowest 0.70s 2 electronic starts

Start reaction over time faster starts higher

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.

50 Freestyle SCY 23.61 7 swims

100 Freestyle SCY 51.87 11 swims

200 Freestyle SCY 1:50.42 8 swims

500 Freestyle SCY 5:04.52 10 swims

100 Backstroke SCY 1:03.28 2 swims

200 Backstroke SCY 2:19.48 1 swim

100 Breaststroke SCY 1:03.98 12 swims

200 Breaststroke SCY 2:23.00 9 swims

100 Butterfly SCY 54.55 11 swims

200 Butterfly SCY 2:02.81 9 swims

200 Individual Medley SCY 2:05.58 11 swims

400 Individual Medley SCY 4:27.61 8 swims

50 Freestyle LCM 27.48 2 swims

100 Freestyle LCM 59.15 1 swim

200 Freestyle LCM 2:07.70 2 swims

400 Freestyle LCM 4:44.70 1 swim

100 Breaststroke LCM 1:16.63 3 swims

200 Breaststroke LCM 2:47.91 5 swims

100 Butterfly LCM 1:02.28 5 swims

200 Butterfly LCM 2:28.60 4 swims

200 Individual Medley LCM 2:25.54 2 swims

400 Individual Medley LCM 5:13.04 2 swims