James Kershaw

Mage 19COIEMTNEUTFACUN

702 plausible swims · 111 meets · 2016-05-07 → 2025-06-22

Personal records

Event	Course	Best	Date	Meet
50 Freestyle	SCY	22.01	2024-05-04	2024 CO OB Front Range League Championships venue
100 Freestyle	SCY	47.90	2024-01-14	2024 CO CUDA Classic venue
200 Freestyle	SCY	1:43.59	2023-11-04	2023 CO TOPS Denver Invitational venue
500 Freestyle	SCY	4:36.96	2023-03-25	2023 Four Corners Speedo Sectionals - Austin venue
1000 Freestyle	SCY	9:52.31	2023-02-10	2023 CO Loveland Sweetheart venue
1650 Freestyle	SCY	16:26.32	2022-03-27	2022 4C Speedo Sectionals - Austin venue
50 Backstroke	SCY	32.59	2018-02-10	2018 CO Loveland Challenger venue
100 Backstroke	SCY	53.84	2023-10-21	2023 CO Loveland Fall Open venue
200 Backstroke	SCY	1:58.15	2023-02-12	2023 CO Loveland Sweetheart venue
50 Breaststroke	SCY	35.85	2017-12-02	2017 CO CSI Pioneer Open venue
100 Breaststroke	SCY	59.81	2023-02-18	2023 CO AP CSI Senior Meet venue
200 Breaststroke	SCY	2:07.95	2024-01-14	2024 CO CUDA Classic venue
50 Butterfly	SCY	31.20	2018-10-13	2018 CO FST Swim Pink slow pool
100 Butterfly	SCY	49.80	2023-11-05	2023 CO TOPS Denver Invitational venue
200 Butterfly	SCY	1:49.33	2023-03-23	2023 Four Corners Speedo Sectionals - Austin venue
100 Individual Medley	SCY	1:09.25	2018-10-13	2018 CO FST Swim Pink slow pool
200 Individual Medley	SCY	1:51.14	2024-05-10	2024 CO OB CHSAA 5A Championships venue
400 Individual Medley	SCY	4:00.50	2023-03-24	2023 Four Corners Speedo Sectionals - Austin venue
1500 Freestyle	SCM	17:39.13	2021-01-16	2021 CO Riptide Mile High Mile venue
50 Freestyle	LCM	25.71	2024-06-29	2024 CO Zone 2 Meet - VMAC venue
100 Freestyle	LCM	54.86	2024-04-27	2024 CO Steve Drozda LC Shotgun venue
200 Freestyle	LCM	2:00.87	2024-06-02	2024 CO Barracuda Summer Sizzler Invite venue
400 Freestyle	LCM	4:07.83	2025-06-20	2025 CO Grand Junction Invitational venue
800 Freestyle	LCM	8:59.92	2022-07-30	Finals - Western Zone Senior Champs fast pool
1500 Freestyle	LCM	16:31.15	2024-06-30	2024 CO Zone 2 Meet - VMAC venue
50 Backstroke	LCM	38.26	2018-07-08	2018 CO Zone 2 Age Group venue
100 Backstroke	LCM	1:04.29	2024-06-28	2024 CO Zone 2 Meet - VMAC venue
200 Backstroke	LCM	2:17.15	2024-06-02	2024 CO Barracuda Summer Sizzler Invite venue
50 Breaststroke	LCM	33.67	2025-04-05	2025 NE CS Season Opener venue
100 Breaststroke	LCM	1:11.72	2023-06-04	2023 CO CUDA Summer Sizzler venue
200 Breaststroke	LCM	2:29.60	2024-06-14	2024 CO CSI Long Course Open venue
50 Butterfly	LCM	27.21	2023-06-02	2023 CO CUDA Summer Sizzler venue
100 Butterfly	LCM	57.51	2024-06-14	2024 CO CSI Long Course Open venue
200 Butterfly	LCM	2:05.58	2024-06-01	2024 CO Barracuda Summer Sizzler Invite venue
200 Individual Medley	LCM	2:12.92	2022-07-28	Finals - Western Zone Senior Champs fast pool
400 Individual Medley	LCM	4:39.23	2025-06-21	2025 CO Grand Junction Invitational venue

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	24.62	flat	200 Free Relay	2019-12-07	2019 CO CSI Pioneer Open
50 Freestyle	SCY	24.44	flying	200 Medley Relay (leg 4)	2019-12-06	2019 CO CSI Pioneer Open
50 Freestyle	SCY	26.78	flying	200 Free Relay (leg 2)	2018-12-01	2018 CO CSI Pioneer Open
100 Freestyle	SCY	52.59	flat	400 Free Relay	2020-03-01	2020 CO CSI 14&U SC AG Championships
100 Freestyle	SCY	47.89	flying	400 Free Relay (leg 2)	2023-03-24	2023 Four Corners Speedo Sectionals - Austin
200 Freestyle	SCY	1:47.94	flat	800 Free Relay	2022-03-26	2022 4C Speedo Sectionals - Austin
200 Freestyle	SCY	1:47.53	flying	800 Free Relay (leg 2)	2023-03-25	2023 Four Corners Speedo Sectionals - Austin
50 Backstroke	SCY	32.16	flat	200 Medley Relay	2018-02-24	2018 CO CSI 14&U Age Group Championships
100 Backstroke	SCY	58.11	flat	400 Medley Relay	2020-02-29	2020 CO CSI 14&U SC AG Championships
50 Breaststroke	SCY	32.73	flying	200 Medley Relay (leg 2)	2018-11-30	2018 CO CSI Pioneer Open
50 Butterfly	SCY	23.07	flying	200 Medley Relay (leg 3)	2023-03-23	2023 Four Corners Speedo Sectionals - Austin
100 Butterfly	SCY	51.01	flying	400 Medley Relay (leg 3)	2023-03-26	2023 Four Corners Speedo Sectionals - Austin
50 Freestyle	LCM	30.78	flying	200 Free Relay (leg 4)	2018-07-29	2018 CO CSI LC Age Group Championships
100 Freestyle	LCM	56.78	flying	400 Free Relay (leg 2)	2022-07-30	Finals - Western Zone Senior Champs
200 Freestyle	LCM	2:01.76	flying	800 Free Relay (leg 4)	2021-07-28	Finals - Western Zone Senior Champs
50 Backstroke	LCM	36.26	flat	200 Medley Relay	2018-07-28	2018 CO CSI LC Age Group Championships
100 Breaststroke	LCM	1:10.87	flying	400 Medley Relay (leg 2)	2022-07-29	Finals - Western Zone Senior Champs
50 Butterfly	LCM	56.25	flying	200 Medley Relay (leg 3)	2017-07-29	2017 CO CSI Age Group LC 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 47.90

23.29

24.61

Front half 23.29s · back half 24.61s

200 Freestyle SCY 1:43.59

24.66

26.21

26.89

25.83

Front half 50.87s · back half 52.72s

500 Freestyle SCY 4:36.96

25.17

27.60

28.24

28.50

28.27

28.65

28.39

28.38

27.70

26.06

Front half 137.78s · back half 139.18s

1000 Freestyle SCY 9:52.31

84.45

30.05

29.66

29.80

29.86

30.27

29.68

29.98

29.63

30.02

29.72

30.16

30.25

30.62

29.98

29.74

29.76

28.68

Front half 323.38s · back half 268.93s

1650 Freestyle SCY 16:26.32 RT 0.79s

27.14

29.87

29.75

30.33

29.75

29.77

30.26

29.89

29.94

29.62

29.94

29.96

29.62

29.95

30.13

29.94

29.79

30.10

30.07

30.16

30.66

30.07

30.49

30.27

30.36

30.42

30.15

30.32

30.24

30.04

29.79

27.38

100 Backstroke SCY 53.84

26.66

27.18

Front half 26.66s · back half 27.18s

200 Backstroke SCY 1:58.15

27.03

29.92

31.23

29.97

Front half 56.95s · back half 61.20s

100 Breaststroke SCY 59.81

29.20

30.61

Front half 29.20s · back half 30.61s

200 Breaststroke SCY 2:07.95

29.67

32.76

33.04

32.48

Front half 62.43s · back half 65.52s

100 Butterfly SCY 49.80

23.82

25.98

Front half 23.82s · back half 25.98s

200 Butterfly SCY 1:49.33

24.33

28.18

28.61

28.21

Front half 52.51s · back half 56.82s

100 Individual Medley SCY 1:09.25

32.16

37.09

Front half 32.16s · back half 37.09s

200 Individual Medley SCY 1:51.14

24.27

27.76

32.27

26.84

Front half 52.03s · back half 59.11s

400 Individual Medley SCY 4:00.50

25.05

28.87

30.85

30.53

35.49

35.45

27.88

26.38

Front half 115.30s · back half 125.20s

100 Freestyle LCM 54.86

26.63

28.23

Front half 26.63s · back half 28.23s

200 Freestyle LCM 2:00.87

28.07

31.31

31.23

30.26

Front half 59.38s · back half 61.49s

400 Freestyle LCM 4:07.83

28.36

30.48

31.32

31.52

31.68

31.63

31.91

30.93

Front half 121.68s · back half 126.15s

800 Freestyle LCM 8:59.92

30.42

34.22

34.40

33.92

33.47

33.87

34.02

34.25

34.28

34.02

34.27

34.58

34.38

33.92

34.19

31.71

Front half 268.57s · back half 271.35s

1500 Freestyle LCM 16:31.15

29.37

32.70

33.26

33.34

33.46

33.65

33.25

33.81

33.43

33.54

33.28

33.76

33.62

33.58

32.85

33.23

33.04

33.38

33.00

33.43

32.90

33.46

32.56

33.55

33.02

33.34

33.03

33.05

32.69

30.57

Front half 496.90s · back half 494.25s

100 Backstroke LCM 1:04.29

31.74

32.55

Front half 31.74s · back half 32.55s

200 Backstroke LCM 2:17.15

32.78

34.52

36.43

33.42

Front half 67.30s · back half 69.85s

200 Breaststroke LCM 2:29.60

34.12

38.38

38.70

38.40

Front half 72.50s · back half 77.10s

200 Butterfly LCM 2:05.58

28.51

32.06

33.00

32.01

Front half 60.57s · back half 65.01s

200 Individual Medley LCM 2:12.92

28.62

34.86

38.36

31.08

Front half 63.48s · back half 69.44s

400 Individual Medley LCM 4:39.23

28.52

32.63

38.12

37.20

41.54

40.56

30.62

30.04

Front half 136.47s · back half 142.76s

Reaction time

fastest 0.50s average 0.728s slowest 0.85s 4 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 22.01 21 swims

100 Freestyle SCY 47.90 18 swims

200 Freestyle SCY 1:43.59 18 swims

500 Freestyle SCY 4:36.96 27 swims

1000 Freestyle SCY 9:52.31 3 swims

1650 Freestyle SCY 16:26.32 4 swims

50 Backstroke SCY 32.59 11 swims

100 Backstroke SCY 53.84 25 swims

200 Backstroke SCY 1:58.15 11 swims

50 Breaststroke SCY 35.85 15 swims

100 Breaststroke SCY 59.81 34 swims

200 Breaststroke SCY 2:07.95 20 swims

50 Butterfly SCY 31.20 15 swims

100 Butterfly SCY 49.80 43 swims

200 Butterfly SCY 1:49.33 32 swims

100 Individual Medley SCY 1:09.25 15 swims

200 Individual Medley SCY 1:51.14 47 swims

400 Individual Medley SCY 4:00.50 23 swims

1500 Freestyle SCM 17:39.13 1 swim

50 Freestyle LCM 25.71 16 swims

100 Freestyle LCM 54.86 20 swims

200 Freestyle LCM 2:00.87 21 swims

400 Freestyle LCM 4:07.83 24 swims

800 Freestyle LCM 8:59.92 5 swims

1500 Freestyle LCM 16:31.15 6 swims

50 Backstroke LCM 38.26 7 swims

100 Backstroke LCM 1:04.29 14 swims

200 Backstroke LCM 2:17.15 11 swims

50 Breaststroke LCM 33.67 12 swims

100 Breaststroke LCM 1:11.72 28 swims

200 Breaststroke LCM 2:29.60 15 swims

50 Butterfly LCM 27.21 13 swims

100 Butterfly LCM 57.51 31 swims

200 Butterfly LCM 2:05.58 32 swims

200 Individual Medley LCM 2:12.92 38 swims

400 Individual Medley LCM 4:39.23 26 swims