Brennen Oneil

Mage 19AKCOCZIAIEMNMTNMPNSEUTCOFASTMTUN

698 plausible swims · 104 meets · 2019-08-07 → 2026-06-27

Personal records

Event	Course	Best	Date	Meet
25 Freestyle	SCY	10.18	2023-09-30	2023 CO FAST Intra-Squad venue
50 Freestyle	SCY	21.76	2026-01-24	2026 CO FAST Winter Open venue
100 Freestyle	SCY	46.32	2024-04-05	2024 Western Zone SCY Senior Zones fast pool
200 Freestyle	SCY	1:40.70	2025-02-22	2025 CO Colorado Senior Meet venue
500 Freestyle	SCY	4:36.24	2024-04-03	2024 Western Zone SCY Senior Zones fast pool
1000 Freestyle	SCY	9:18.81	2026-03-26	2026 Four Corner Speedo Sectionals - Carmel - fast pool
1650 Freestyle	SCY	15:50.42	2023-03-12	2023 Northwest Spring Speedo Sectionals venue
25 Backstroke	SCY	11.80	2023-09-30	2023 CO FAST Intra-Squad venue
50 Backstroke	SCY	24.12	2024-10-18	2024 CO Scary FAST Invite venue
100 Backstroke	SCY	49.37	2026-03-27	2026 Four Corner Speedo Sectionals - Carmel - fast pool
200 Backstroke	SCY	1:46.07	2025-01-01	2025 USA Swimming Speedo Championship Series
25 Breaststroke	SCY	12.32	2023-09-30	2023 CO FAST Intra-Squad venue
50 Breaststroke	SCY	27.38	2024-10-18	2024 CO Scary FAST Invite venue
100 Breaststroke	SCY	57.47	2025-01-01	2025 CO Pikes Peak Finals
200 Breaststroke	SCY	2:02.54	2025-02-23	2025 CO Colorado Senior Meet venue
25 Butterfly	SCY	10.24	2023-09-30	2023 CO FAST Intra-Squad venue
50 Butterfly	SCY	23.04	2024-10-18	2024 CO Scary FAST Invite venue
100 Butterfly	SCY	49.89	2025-01-01	2025 CO Pikes Peak Finals
200 Butterfly	SCY	1:54.34	2025-01-01	Colorado Swimming Championship Meet
100 Individual Medley	SCY	53.00	2025-01-01	Colorado Swimming Championship Meet
200 Individual Medley	SCY	1:49.13	2024-05-10	2024 CO OB CHSAA 5A Championships venue
400 Individual Medley	SCY	3:51.67	2025-12-12	2025 West Speedo Winter Juniors venue
800 Individual Medley	SCY	8:29.31	2025-01-24	2025 CO FAST Winter Open venue
50 Freestyle	LCM	24.84	2026-01-01	1723269
100 Freestyle	LCM	54.33	2026-01-01	1723269
200 Freestyle	LCM	1:57.66	2026-06-05	FAST June Bonanza - copied
400 Freestyle	LCM	4:09.58	2024-03-16	2024 Northwest Spring Speedo Sectionals venue
800 Freestyle	LCM	8:43.15	2024-03-14	2024 Northwest Spring Speedo Sectionals venue
1500 Freestyle	LCM	16:20.57	2024-07-30	WZ LCM Senior Champs 2024 venue
50 Backstroke	LCM	26.85	2025-07-30	2025 Speedo Junior National Championships fast pool
100 Backstroke	LCM	56.88	2025-08-02	2025 Speedo Junior National Championships fast pool
200 Backstroke	LCM	2:05.48	2024-07-30	WZ LCM Senior Champs 2024
50 Breaststroke	LCM	31.96	2025-04-25	2025 CO FAST Spring Splash LC Open venue
100 Breaststroke	LCM	1:09.64	2024-11-24	2024 CO Junior National LC Camp venue
200 Breaststroke	LCM	2:24.22	2025-06-13	2025 CO CSI Long Course Open fast pool
50 Butterfly	LCM	26.70	2025-01-01	1608906
100 Butterfly	LCM	57.66	2024-06-14	2024 CO CSI Long Course Open fast pool
200 Butterfly	LCM	2:19.94	2022-07-17	2022 CO NCS Gold District Championships venue
200 Individual Medley	LCM	2:05.35	2024-07-30	WZ LCM Senior Champs 2024
400 Individual Medley	LCM	4:30.25	2025-07-31	2025 Speedo Junior National Championships fast pool

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	21.56	flying	200 Free Relay (leg 2)	2024-04-06	2024 Western Zone SCY Senior Zones
200 Freestyle	SCY	1:43.84	flying	800 Free Relay (leg 4)	2026-03-28	2026 Four Corner Speedo Sectionals - Carmel -
100 Backstroke	SCY	51.54	flat	400 Medley Relay	2025-03-15	2025 MN RSC CZ North Section Spring Champions
50 Breaststroke	SCY	26.38	flying	200 Medley Relay (leg 2)	2024-04-05	2024 Western Zone SCY Senior Zones
50 Freestyle	LCM	30.82	flying	200 Free Relay (leg 3)	2019-08-10	2019 Western Zone Age Group Championships
100 Freestyle	LCM	1:08.05	flying	400 Free Relay (leg 4)	2019-08-07	2019 Western Zone Age Group Championships
200 Freestyle	LCM	2:04.25	flat	800 Free Relay	2022-07-28	Finals - Western Zone Senior Champs
50 Backstroke	LCM	27.80	flat	200 Medley Relay	2024-07-30	WZ LCM Senior Champs 2024
50 Butterfly	LCM	32.80	flying	200 Medley Relay (leg 3)	2019-08-08	2019 Western Zone 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.

PR splits

100 Freestyle SCY 46.32

22.28

24.04

Front half 22.28s · back half 24.04s

200 Freestyle SCY 1:40.70

23.28

25.69

26.21

25.52

Front half 48.97s · back half 51.73s

500 Freestyle SCY 4:36.24

24.66

26.98

27.74

28.11

28.26

28.57

28.53

28.76

28.33

26.30

Front half 135.75s · back half 140.49s

1000 Freestyle SCY 9:18.81

24.61

26.98

27.78

27.98

27.66

27.93

28.08

28.24

28.88

28.43

28.31

28.45

28.61

28.52

28.54

28.19

28.65

28.47

28.39

26.11

Front half 276.57s · back half 282.24s

1650 Freestyle SCY 15:50.42 RT 0.64s

25.00

27.70

28.30

28.76

28.99

28.77

28.88

29.09

29.01

29.09

28.78

29.18

29.47

29.12

29.14

28.92

29.05

29.36

29.10

29.54

28.94

29.07

28.97

29.02

28.88

28.84

29.10

29.26

29.01

29.06

28.64

27.20

100 Backstroke SCY 49.37

23.82

25.55

Front half 23.82s · back half 25.55s

200 Backstroke SCY 1:46.07 split/total mismatch

24.93

26.36

27.44

27.34

200 Breaststroke SCY 2:02.54

28.34

31.46

31.14

31.60

Front half 59.80s · back half 62.74s

200 Individual Medley SCY 1:49.13

23.65

26.74

32.35

26.39

Front half 50.39s · back half 58.74s

400 Individual Medley SCY 3:51.67

24.51

28.43

29.69

29.37

33.01

32.50

27.76

26.40

Front half 112.00s · back half 119.67s

800 Individual Medley SCY 8:29.31

27.41

30.46

31.21

31.63

32.57

31.91

31.89

31.18

37.28

36.16

36.32

36.58

29.22

29.34

28.88

27.27

Front half 248.26s · back half 261.05s

400 Freestyle LCM 4:09.58 RT 0.65s

58.54

63.42

65.20

62.42

Front half 121.96s · back half 127.62s

800 Freestyle LCM 8:43.15

27.75

30.82

32.06

32.80

32.74

33.20

33.01

34.04

33.21

33.83

33.37

33.95

33.60

33.71

33.26

31.80

Front half 256.42s · back half 266.73s

1500 Freestyle LCM 16:20.57

28.27

31.21

32.13

31.98

32.87

32.39

33.15

32.82

33.13

32.62

33.48

32.59

33.01

33.29

33.21

33.42

33.08

33.39

32.32

33.15

33.35

33.28

33.03

33.33

32.70

33.52

32.76

33.31

32.43

31.35

Front half 486.15s · back half 494.42s

100 Backstroke LCM 56.88 RT 0.54s

27.77

29.11

Front half 27.77s · back half 29.11s

100 Breaststroke LCM 1:09.64

31.92

37.72

Front half 31.92s · back half 37.72s

200 Breaststroke LCM 2:24.22

32.48

36.68

37.65

37.41

Front half 69.16s · back half 75.06s

100 Butterfly LCM 57.66

27.44

30.22

Front half 27.44s · back half 30.22s

200 Butterfly LCM 2:19.94

30.93

34.39

37.36

37.26

Front half 65.32s · back half 74.62s

400 Individual Medley LCM 4:30.25 RT 0.70s

27.79

32.51

35.54

34.07

37.83

39.42

32.01

31.08

Front half 129.91s · back half 140.34s

Reaction time

fastest 0.39s average 0.670s slowest 0.92s 32 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.

25 Freestyle SCY 10.18 3 swims

50 Freestyle SCY 21.76 15 swims

100 Freestyle SCY 46.32 21 swims

200 Freestyle SCY 1:40.70 30 swims

500 Freestyle SCY 4:36.24 27 swims

1000 Freestyle SCY 9:18.81 13 swims

1650 Freestyle SCY 15:50.42 12 swims

25 Backstroke SCY 11.80 2 swims

50 Backstroke SCY 24.12 6 swims

100 Backstroke SCY 49.37 47 swims

200 Backstroke SCY 1:46.07 42 swims

25 Breaststroke SCY 12.32 2 swims

50 Breaststroke SCY 27.38 5 swims

100 Breaststroke SCY 57.47 20 swims

200 Breaststroke SCY 2:02.54 31 swims

25 Butterfly SCY 10.24 2 swims

50 Butterfly SCY 23.04 4 swims

100 Butterfly SCY 49.89 26 swims

200 Butterfly SCY 1:54.34 12 swims

100 Individual Medley SCY 53.00 7 swims

200 Individual Medley SCY 1:49.13 63 swims

400 Individual Medley SCY 3:51.67 40 swims

800 Individual Medley SCY 8:29.31 2 swims

50 Freestyle LCM 24.84 5 swims

100 Freestyle LCM 54.33 13 swims

200 Freestyle LCM 1:57.66 21 swims

400 Freestyle LCM 4:09.58 32 swims

800 Freestyle LCM 8:43.15 6 swims

1500 Freestyle LCM 16:20.57 9 swims

50 Backstroke LCM 26.85 6 swims

100 Backstroke LCM 56.88 20 swims

200 Backstroke LCM 2:05.48 17 swims

50 Breaststroke LCM 31.96 4 swims

100 Breaststroke LCM 1:09.64 10 swims

200 Breaststroke LCM 2:24.22 13 swims

50 Butterfly LCM 26.70 4 swims

100 Butterfly LCM 57.66 22 swims

200 Butterfly LCM 2:19.94 9 swims

200 Individual Medley LCM 2:05.35 44 swims

400 Individual Medley LCM 4:30.25 30 swims