Oliver Brereton

Mage 13GUILINMIOKOZBSCILPPD

79 plausible swims · 12 meets · 2023-08-03 → 2026-03-15

Personal records

Event	Course	Best	Cut	Date	Meet
200 Freestyle	SCY	1:49.89	AAAA	2026-03-13	2026 ISI Winter 11-14 Age Group Championships venue
500 Freestyle	SCY	4:55.56	AAAA	2026-03-14	2026 ISI Winter 11-14 Age Group Championships venue
1000 Freestyle	SCY	10:14.43	AAAA	2026-03-15	2026 ISI Winter 11-14 Age Group Championships venue
100 Backstroke	SCY	1:00.55	AA+2.06s to AAA	2025-03-15	2025 ISI Winter 11-14 Age Group Championships venue
200 Backstroke	SCY	2:09.41	AA+2.02s to AAA	2025-03-14	2025 ISI Winter 11-14 Age Group Championships venue
100 Butterfly	SCY	1:04.88	BB+1.69s to A	2024-03-08	2024 IL Swimming SC Age Group Championships slow pool
200 Butterfly	SCY	2:01.25	AAAA	2026-03-15	2026 ISI Winter 11-14 Age Group Championships venue
100 Individual Medley	SCY	1:00.47		2025-03-14	2025 ISI Winter 11-14 Age Group Championships venue
200 Individual Medley	SCY	2:02.00	AAAA	2026-03-14	2026 ISI Winter 11-14 Age Group Championships venue
400 Individual Medley	SCY	4:20.13	AAAA	2026-03-13	2026 ISI Winter 11-14 Age Group Championships venue
100 Freestyle	LCM	1:02.74	AA+1.25s to AAA	2025-01-01	'25 Duel in the Pool
200 Freestyle	LCM	2:07.29	AAAA	2025-07-26	Illinois Swimming Age Group Champs LC 25 venue
400 Freestyle	LCM	4:31.56	AAA+1.57s to AAAA	2025-07-25	Illinois Swimming Age Group Champs LC 25 venue
800 Freestyle	LCM	9:22.10	AAAA	2025-07-24	Illinois Swimming Age Group Champs LC 25 venue
1500 Freestyle	LCM	18:04.03	AAA+4.84s to AAAA	2025-07-27	Illinois Swimming Age Group Champs LC 25 venue
200 Backstroke	LCM	2:37.55	A+1.66s to AA	2024-07-21	2024 IL Swimming LC Age Group Championships venue
100 Butterfly	LCM	1:09.10	A+0.01s to AA	2024-07-21	2024 IL Swimming LC Age Group Championships venue
200 Butterfly	LCM	2:25.14	AAA+3.45s to AAAA	2025-07-24	Illinois Swimming Age Group Champs LC 25 venue
200 Individual Medley	LCM	2:27.55	AAA+4.76s to AAAA	2025-07-27	Illinois Swimming Age Group Champs LC 25 venue
400 Individual Medley	LCM	4:58.84	AAAA	2026-01-01	DePauw University

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 13.

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	25.10	flying	200 Free Relay (leg 4)	2025-03-13	2025 ISI Winter 11-14 Age Group Championships
100 Freestyle	SCY	51.62	flat	400 Free Relay	2026-03-15	2026 ISI Winter 11-14 Age Group Championships
100 Freestyle	SCY	53.56	flying	400 Free Relay (leg 4)	2025-03-16	2025 ISI Winter 11-14 Age Group Championships
50 Backstroke	SCY	28.84	flat	200 Medley Relay	2025-03-14	2025 ISI Winter 11-14 Age Group Championships
100 Breaststroke	SCY	1:18.59	flying	400 Medley Relay (leg 2)	2024-03-09	2024 IL Swimming SC Age Group Championships
50 Freestyle	LCM	27.83	flying	200 Free Relay (leg 3)	2025-07-24	Illinois Swimming Age Group Champs LC 25
100 Freestyle	LCM	59.39	flying	400 Free Relay (leg 3)	2025-07-26	Illinois Swimming Age Group Champs LC 25
100 Butterfly	LCM	1:11.26	flying	400 Medley Relay (leg 3)	2024-07-21	2024 IL Swimming LC Age Group 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 13-14 · SCY

4408 points (5/6 events — incomplete)

Event	Time	Points
500 FR SCY	4:55.56	937
200 BK SCY	2:09.41	720
200 FL SCY	2:01.25	912
200 IM SCY	2:02.00	916
400 IM SCY	4:20.13	923
200 BR SCY	—	0

IMR 13-14 · SCY

3066 points (4/5 events — incomplete)

Event	Time	Points
200 FR SCY	1:49.89	920
100 BK SCY	1:00.55	689
100 FL SCY	1:04.88	541
200 IM SCY	2:02.00	916
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

200 Freestyle SCY 1:49.89

25.32

27.51

28.57

28.49

Front half 52.83s · back half 57.06s

500 Freestyle SCY 4:55.56

26.54

29.15

29.56

29.75

30.13

30.40

30.23

30.41

30.04

29.35

Front half 145.13s · back half 150.43s

1000 Freestyle SCY 10:14.43

27.65

30.56

31.12

31.25

30.87

30.94

31.23

31.28

31.18

31.47

30.76

31.06

30.90

31.16

31.06

31.00

30.59

30.63

30.21

29.51

Front half 307.55s · back half 306.88s

100 Backstroke SCY 1:00.55 RT 0.67s

29.76

30.79

Front half 29.76s · back half 30.79s

200 Backstroke SCY 2:09.41 RT 0.66s

30.63

33.42

33.05

32.31

Front half 64.05s · back half 65.36s

100 Butterfly SCY 1:04.88

30.23

34.65

Front half 30.23s · back half 34.65s

200 Butterfly SCY 2:01.25

27.78

30.47

31.65

31.35

Front half 58.25s · back half 63.00s

100 Individual Medley SCY 1:00.47 RT 0.64s

27.70

32.77

Front half 27.70s · back half 32.77s

200 Individual Medley SCY 2:02.00

27.60

30.78

35.49

28.13

Front half 58.38s · back half 63.62s

400 Individual Medley SCY 4:20.13

27.79

30.94

31.90

33.65

37.39

38.47

30.22

29.77

Front half 124.28s · back half 135.85s

200 Freestyle LCM 2:07.29 RT 0.66s

29.64

32.01

33.11

32.53

Front half 61.65s · back half 65.64s

400 Freestyle LCM 4:31.56

31.63

33.94

35.00

34.49

34.73

34.60

34.53

32.64

Front half 135.06s · back half 136.50s

800 Freestyle LCM 9:22.10 RT 0.70s

31.99

36.01

35.57

36.30

35.32

36.13

35.52

35.49

34.97

35.24

35.19

35.64

34.48

35.38

34.62

34.25

Front half 282.33s · back half 279.77s

1500 Freestyle LCM 18:04.03 RT 0.69s

32.65

36.73

36.48

36.52

37.21

36.92

37.30

37.53

37.18

36.78

35.11

36.30

35.77

36.02

36.04

36.25

36.17

36.34

36.38

36.51

35.38

36.46

35.87

36.14

36.63

36.37

35.60

36.35

35.15

33.89

Front half 544.54s · back half 539.49s

200 Backstroke LCM 2:37.55

36.72

40.83

40.65

39.35

Front half 77.55s · back half 80.00s

100 Butterfly LCM 1:09.10

33.04

36.06

Front half 33.04s · back half 36.06s

200 Butterfly LCM 2:25.14 RT 0.67s

32.43

36.49

37.89

38.33

Front half 68.92s · back half 76.22s

200 Individual Medley LCM 2:27.55

31.84

38.00

45.19

32.52

Front half 69.84s · back half 77.71s

400 Individual Medley LCM 4:58.84 split/total mismatch

30.68

35.38

38.70

39.30

43.66

43.08

34.88

33.16

Reaction time

fastest 0.62s average 0.668s slowest 0.71s 19 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.

200 Freestyle SCY 1:49.89 4 swims

500 Freestyle SCY 4:55.56 3 swims

1000 Freestyle SCY 10:14.43 3 swims

100 Backstroke SCY 1:00.55 2 swims

200 Backstroke SCY 2:09.41 4 swims

100 Butterfly SCY 1:04.88 2 swims

200 Butterfly SCY 2:01.25 6 swims

100 Individual Medley SCY 1:00.47 2 swims

200 Individual Medley SCY 2:02.00 7 swims

400 Individual Medley SCY 4:20.13 2 swims

100 Freestyle LCM 1:02.74 1 swim

200 Freestyle LCM 2:07.29 8 swims

400 Freestyle LCM 4:31.56 5 swims

800 Freestyle LCM 9:22.10 4 swims

1500 Freestyle LCM 18:04.03 3 swims

200 Backstroke LCM 2:37.55 2 swims

100 Butterfly LCM 1:09.10 7 swims

200 Butterfly LCM 2:25.14 5 swims

200 Individual Medley LCM 2:27.55 7 swims

400 Individual Medley LCM 4:58.84 2 swims