Josiah Cheung

Mage 12MTORPNBAAC

172 plausible swims · 30 meets · 2024-10-19 → 2026-06-28

Personal records

Event	Course	Best	Cut	Date	Meet
50 Freestyle	SCY	31.04	B+0.55s to BB	2026-01-18	2026 THSC 14&U Winter Showcase venue
100 Freestyle	SCY	1:06.29	BB+5.00s to A	2026-01-04	2026 CST Shark Chase Invitational venue
200 Freestyle	SCY	2:23.28	BB+9.59s to A	2026-03-07	2026 OSI Arena SC 11-14 Champs fast pool
500 Freestyle	SCY	6:18.49	BB+18.50s to A	2026-01-02	2026 CST Shark Chase Invitational venue
50 Backstroke	SCY	37.14	B+1.55s to BB	2026-02-08	2026 OR HEAT BC Blastoff venue
100 Backstroke	SCY	1:23.31	+1.12s to B	2025-11-08	2025 McSwimville Invitational venue
50 Breaststroke	SCY	38.51	BB+1.82s to A	2026-01-24	2026 TTSC Winter Qualifier venue
100 Breaststroke	SCY	1:21.88	BB+3.49s to A	2026-01-18	2026 THSC 14&U Winter Showcase venue
200 Breaststroke	SCY	2:52.48	BB+4.09s to A	2026-01-23	2026 TTSC Winter Qualifier venue
50 Butterfly	SCY	33.18	BB+1.99s to A	2026-01-04	2026 CST Shark Chase Invitational venue
100 Butterfly	SCY	1:17.36	B+1.27s to BB	2026-01-17	2026 THSC 14&U Winter Showcase venue
100 Individual Medley	SCY	1:15.23	BB+5.24s to A	2026-03-22	2026 NW Region Age Group Champs- Approved venue
200 Individual Medley	SCY	2:39.50	BB+7.21s to A	2026-01-16	2026 THSC 14&U Winter Showcase venue
200 Freestyle	SCM	2:51.69	B+11.60s to BB	2025-08-03	GACC 2025 End of Season Meet venue
200 Breaststroke	SCM	3:23.83	B+2.24s to BB	2025-08-03	GACC 2025 End of Season Meet venue
100 Individual Medley	SCM	1:28.45	B+4.56s to BB	2025-08-03	GACC 2025 End of Season Meet venue
50 Freestyle	LCM	34.33	BB+2.24s to A	2026-06-27	2026 TEAM Summer Invitational venue
100 Freestyle	LCM	1:12.31	BB+1.92s to A	2026-06-26	2026 TEAM Summer Invitational venue
200 Freestyle	LCM	3:01.72	+2.53s to B	2025-06-01	LA OPEN 2025 venue
400 Freestyle	LCM	5:30.04	BB+3.35s to A	2026-06-12	2026 THSC June Open venue
50 Backstroke	LCM	42.88	B+1.69s to BB	2026-06-26	2026 TEAM Summer Invitational venue
100 Backstroke	LCM	1:28.52	BB+6.63s to A	2026-05-23	2026 THSC Memorial Weekend Meet venue
50 Breaststroke	LCM	43.65	BB+1.66s to A	2026-06-14	2026 THSC June Open venue
100 Breaststroke	LCM	1:34.15	BB+2.86s to A	2026-06-13	2026 THSC June Open venue
200 Breaststroke	LCM	3:12.73	A+5.54s to AA	2026-06-27	2026 TEAM Summer Invitational venue
50 Butterfly	LCM	37.81	BB+2.52s to A	2026-06-28	2026 TEAM Summer Invitational venue
100 Butterfly	LCM	1:26.70	BB+7.21s to A	2026-04-19	2026 MAC LONG-COURSE INVITATIONAL venue
200 Individual Medley	LCM	2:55.16	BB+0.97s to A	2026-06-14	2026 THSC June Open venue

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

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 Breaststroke	SCY	38.99	flying	200 Medley Relay (leg 2)	2026-03-08	2026 OSI Arena SC 11-14 Champs
100 Breaststroke	SCY	1:25.24	flying	400 Medley Relay (leg 2)	2026-03-06	2026 OSI Arena SC 11-14 Champs

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

2854 points (5/5 events)

Event	Time	Points
400 FR LCM	5:30.04	649
100 BK LCM	1:28.52	502
100 BR LCM	1:34.15	590
100 FL LCM	1:26.70	478
200 IM LCM	2:55.16	635

IMR 11-12 · SCY

2582 points (5/5 events)

Event	Time	Points
200 FR SCY	2:23.28	544
50 BK SCY	37.14	437
50 BR SCY	38.51	546
50 FL SCY	33.18	520
100 IM SCY	1:15.23	535

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

PR splits

100 Freestyle SCY 1:06.29

32.05

34.24

Front half 32.05s · back half 34.24s

200 Freestyle SCY 2:23.28

33.94

37.34

36.88

35.12

Front half 71.28s · back half 72.00s

500 Freestyle SCY 6:18.49

35.74

38.33

39.15

38.31

38.15

39.60

38.40

39.01

37.31

34.49

Front half 189.68s · back half 188.81s

100 Backstroke SCY 1:23.31

42.06

41.25

Front half 42.06s · back half 41.25s

100 Breaststroke SCY 1:21.88

39.02

42.86

Front half 39.02s · back half 42.86s

200 Breaststroke SCY 2:52.48

39.32

44.41

44.61

44.14

Front half 83.73s · back half 88.75s

100 Butterfly SCY 1:17.36

36.48

40.88

Front half 36.48s · back half 40.88s

100 Individual Medley SCY 1:15.23 RT 0.62s

35.32

39.91

Front half 35.32s · back half 39.91s

200 Individual Medley SCY 2:39.50

36.79

41.61

45.87

35.23

Front half 78.40s · back half 81.10s

200 Freestyle SCM 2:51.69

39.44

43.90

44.79

43.56

Front half 83.34s · back half 88.35s

200 Breaststroke SCM 3:23.83

47.50

52.16

53.41

50.76

Front half 99.66s · back half 104.17s

100 Individual Medley SCM 1:28.45

42.80

45.65

Front half 42.80s · back half 45.65s

200 Freestyle LCM 3:01.72

40.98

46.87

46.44

47.43

Front half 87.85s · back half 93.87s

400 Freestyle LCM 5:30.04

36.85

41.51

42.19

42.93

42.30

42.47

40.99

40.80

Front half 163.48s · back half 166.56s

100 Backstroke LCM 1:28.52

43.54

44.98

Front half 43.54s · back half 44.98s

100 Breaststroke LCM 1:34.15

45.85

48.30

Front half 45.85s · back half 48.30s

200 Breaststroke LCM 3:12.73

45.87

49.29

49.32

48.25

Front half 95.16s · back half 97.57s

200 Individual Medley LCM 2:55.16

39.23

45.97

48.98

40.98

Front half 85.20s · back half 89.96s

Reaction time

fastest 0.62s average 0.663s slowest 0.73s 6 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 31.04 7 swims

100 Freestyle SCY 1:06.29 9 swims

200 Freestyle SCY 2:23.28 4 swims

500 Freestyle SCY 6:18.49 3 swims

50 Backstroke SCY 37.14 6 swims

100 Backstroke SCY 1:23.31 2 swims

50 Breaststroke SCY 38.51 9 swims

100 Breaststroke SCY 1:21.88 12 swims

200 Breaststroke SCY 2:52.48 7 swims

50 Butterfly SCY 33.18 9 swims

100 Butterfly SCY 1:17.36 10 swims

100 Individual Medley SCY 1:15.23 7 swims

200 Individual Medley SCY 2:39.50 7 swims

200 Freestyle SCM 2:51.69 1 swim

200 Breaststroke SCM 3:23.83 1 swim

100 Individual Medley SCM 1:28.45 1 swim

50 Freestyle LCM 34.33 5 swims

100 Freestyle LCM 1:12.31 7 swims

200 Freestyle LCM 3:01.72 2 swims

400 Freestyle LCM 5:30.04 4 swims

50 Backstroke LCM 42.88 6 swims

100 Backstroke LCM 1:28.52 5 swims

50 Breaststroke LCM 43.65 8 swims

100 Breaststroke LCM 1:34.15 12 swims

200 Breaststroke LCM 3:12.73 4 swims

50 Butterfly LCM 37.81 10 swims

100 Butterfly LCM 1:26.70 5 swims

200 Individual Medley LCM 2:55.16 9 swims