Jeffrey Chang

Mage 17CAPCEVONOVAUN-07

123 plausible swims · 21 meets · 2024-07-25 → 2026-06-21

Personal records

Event	Course	Best	Cut	Date	Meet
50 Freestyle	SCY	21.57	AAA+0.48s to AAAA	2026-02-28	2026 SI CA/NV Speedo Sectionals Oceanside venue
100 Freestyle	SCY	46.10	AAA+0.01s to AAAA	2026-03-01	2026 SI CA/NV Speedo Sectionals Oceanside venue
200 Freestyle	SCY	1:39.34	AAAA	2026-02-27	2026 SI CA/NV Speedo Sectionals Oceanside venue
500 Freestyle	SCY	4:41.04	AAA+5.55s to AAAA	2025-02-28	2025 RBAC March Madness Spring Championship venue
1000 Freestyle	SCY	10:04.77	AA+0.28s to AAA	2026-01-18	CMAC - OC Senior Swim Series Meet 6 venue
100 Backstroke	SCY	55.67	A+0.78s to AA	2025-09-21	OC Senior Series Meet # 1 venue
200 Backstroke	SCY	1:59.74	AA+4.95s to AAA	2025-09-20	OC Senior Series Meet # 1 venue
200 Breaststroke	SCY	2:13.74	AA+4.65s to AAA	2024-12-15	2024 CA RAA/SCS WAG venue
100 Butterfly	SCY	52.95	AA+0.96s to AAA	2026-01-31	2026 AZOT H/F BB MIN Leaderboard Invitational venue
200 Butterfly	SCY	2:03.67	A+1.48s to AA	2026-01-17	CMAC - OC Senior Swim Series Meet 6 venue
200 Individual Medley	SCY	1:55.44	AAA+3.25s to AAAA	2026-01-30	2026 AZOT H/F BB MIN Leaderboard Invitational venue
50 Freestyle	LCM	24.61	AAA+0.22s to AAAA	2026-05-22	2026 CA 30th NOVA-Speedo Grand Challenge venue
100 Freestyle	LCM	53.15	AAA+0.16s to AAAA	2026-05-24	2026 CA 30th NOVA-Speedo Grand Challenge venue
200 Freestyle	LCM	1:58.77	AAA+2.18s to AAAA	2025-04-12	2025 CA MVN Fran Crippen SMOC venue
400 Freestyle	LCM	4:17.31	AAA+8.62s to AAAA	2026-05-23	2026 CA 30th NOVA-Speedo Grand Challenge venue
100 Backstroke	LCM	1:03.19	AA+1.30s to AAA	2026-06-21	2026 CA MVN Fran Crippen SMOC venue
200 Backstroke	LCM	2:20.80	AA+6.01s to AAA	2024-07-25	2024 CA SCS/GWSC Summer A/G Champs slow pool
50 Butterfly	LCM	27.13	AAA+0.74s to AAAA	2026-06-20	2026 CA MVN Fran Crippen SMOC venue
100 Butterfly	LCM	1:03.91	A+1.52s to AA	2024-07-27	2024 CA SCS/GWSC Summer A/G Champs slow pool
200 Individual Medley	LCM	2:17.14	AA+0.95s to AAA	2025-04-13	2025 CA MVN Fran Crippen SMOC venue

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 17.

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	22.85	flat	200 Free Relay	2025-09-21	OC Senior Series Meet # 1
50 Freestyle	SCY	21.21	flying	200 Medley Relay (leg 4)	2025-10-12	2025 OC Race Series #2 SCY Closed Invite
50 Freestyle	SCY	21.25	flying	200 Free Relay (leg 2)	2026-02-26	2026 SI CA/NV Speedo Sectionals Oceanside
100 Freestyle	SCY	48.32	flat	400 Free Relay	2025-10-12	2025 OC Race Series #2 SCY Closed Invite
100 Freestyle	SCY	46.34	flying	400 Free Relay (leg 4)	2025-11-09	2025 Legends of Coaching Series_Peter Daland
100 Freestyle	SCY	46.40	flying	400 Medley Relay (leg 4)	2025-11-07	2025 Legends of Coaching Series_Peter Daland
200 Freestyle	SCY	1:43.48	flat	800 Free Relay	2025-11-06	2025 Legends of Coaching Series_Peter Daland
200 Freestyle	LCM	6:03.22	flying	800 Free Relay (leg 3)	2024-07-26	2024 CA SCS/GWSC Summer A/G 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 17-18 · SCY

3972 points (5/6 events — incomplete)

Event	Time	Points
500 FR SCY	4:41.04	910
200 BK SCY	1:59.74	731
200 BR SCY	2:13.74	753
200 FL SCY	2:03.67	699
200 IM SCY	1:55.44	879
400 IM SCY	—	0

IMR 17-18 · SCY

3377 points (4/5 events — incomplete)

Event	Time	Points
200 FR SCY	1:39.34	1025
100 BK SCY	55.67	677
100 FL SCY	52.95	796
200 IM SCY	1:55.44	879
100 BR SCY	—	0

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

PR splits

100 Freestyle SCY 46.10

22.25

23.85

Front half 22.25s · back half 23.85s

200 Freestyle SCY 1:39.34

23.21

25.24

25.32

25.57

Front half 48.45s · back half 50.89s

500 Freestyle SCY 4:41.04

25.23

27.48

27.86

28.45

28.57

28.39

28.65

29.03

29.09

28.29

Front half 137.59s · back half 143.45s

1000 Freestyle SCY 10:04.77

27.32

29.90

30.30

30.74

30.57

31.05

30.79

30.69

30.63

30.04

29.55

30.41

30.34

30.76

30.71

30.40

30.54

30.58

30.63

28.82

Front half 302.03s · back half 302.74s

100 Backstroke SCY 55.67

27.37

28.30

Front half 27.37s · back half 28.30s

200 Backstroke SCY 1:59.74

28.69

30.92

30.07

30.06

Front half 59.61s · back half 60.13s

200 Breaststroke SCY 2:13.74

29.63

33.47

34.63

36.01

Front half 63.10s · back half 70.64s

100 Butterfly SCY 52.95

24.99

27.96

Front half 24.99s · back half 27.96s

200 Butterfly SCY 2:03.67

27.43

31.97

31.94

32.33

Front half 59.40s · back half 64.27s

200 Individual Medley SCY 1:55.44

25.10

29.82

34.63

25.89

Front half 54.92s · back half 60.52s

100 Freestyle LCM 53.15

25.47

27.68

Front half 25.47s · back half 27.68s

200 Freestyle LCM 1:58.77

27.81

30.03

30.27

30.66

Front half 57.84s · back half 60.93s

400 Freestyle LCM 4:17.31

29.83

32.70

32.69

32.96

32.66

32.86

32.42

31.19

Front half 128.18s · back half 129.13s

100 Backstroke LCM 1:03.19

30.79

32.40

Front half 30.79s · back half 32.40s

200 Backstroke LCM 2:20.80

32.52

36.10

36.61

35.57

Front half 68.62s · back half 72.18s

100 Butterfly LCM 1:03.91

29.72

34.19

Front half 29.72s · back half 34.19s

200 Individual Medley LCM 2:17.14

29.19

36.70

41.17

30.08

Front half 65.89s · back half 71.25s

Reaction time

fastest 0.55s average 0.647s slowest 0.68s 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 21.57 9 swims

100 Freestyle SCY 46.10 9 swims

200 Freestyle SCY 1:39.34 14 swims

500 Freestyle SCY 4:41.04 9 swims

1000 Freestyle SCY 10:04.77 1 swim

100 Backstroke SCY 55.67 4 swims

200 Backstroke SCY 1:59.74 3 swims

200 Breaststroke SCY 2:13.74 6 swims

100 Butterfly SCY 52.95 5 swims

200 Butterfly SCY 2:03.67 1 swim

200 Individual Medley SCY 1:55.44 8 swims

50 Freestyle LCM 24.61 7 swims

100 Freestyle LCM 53.15 13 swims

200 Freestyle LCM 1:58.77 13 swims

400 Freestyle LCM 4:17.31 7 swims

100 Backstroke LCM 1:03.19 4 swims

200 Backstroke LCM 2:20.80 1 swim

50 Butterfly LCM 27.13 1 swim

100 Butterfly LCM 1:03.91 1 swim

200 Individual Medley LCM 2:17.14 7 swims