Jonathan Kern

Mage 15EZMRNCNJVANJNJBSCAR

99 plausible swims · 15 meets · 2023-01-01 → 2026-03-29

Personal records

Event	Course	Best	Cut	Date	Meet
50 Freestyle	SCY	22.45	AAA+0.76s to AAAA	2025-03-20	2025 NJS & Scarlet Gold Championship
100 Freestyle	SCY	48.72	AAA+1.23s to AAAA	2025-03-20	2025 NJS & Scarlet Gold Championship
200 Freestyle	SCY	1:45.05	AAA+1.26s to AAAA	2026-03-27	2026 EZ North Speedo Short Course Sectionals venue
1000 Freestyle	SCY	10:12.06	AAA+24.27s to AAAA	2025-03-20	2025 NJS & Scarlet Gold Championship
50 Backstroke	SCY	23.98	AAAA	2026-03-27	2026 EZ North Speedo Short Course Sectionals venue
100 Backstroke	SCY	51.46	AAAA	2026-03-28	2026 EZ North Speedo Short Course Sectionals venue
200 Backstroke	SCY	1:52.39	AAAA	2026-03-29	2026 EZ North Speedo Short Course Sectionals venue
100 Butterfly	SCY	54.46	AA+0.47s to AAA	2025-03-20	2025 NJS & Scarlet Gold Championship
200 Butterfly	SCY	1:59.37	AAA+3.88s to AAAA	2025-11-16	2025 NC SwimMAC November LC SC Invitational venue
200 Individual Medley	SCY	1:59.78	AAA+4.09s to AAAA	2025-01-24	2025 MR HAWKS Trials And Finals Invitational
50 Freestyle	SCM	28.54	BB+1.25s to A	2023-05-12	2023 MR NYS Spring Frenzy Invitational slow pool
100 Freestyle	SCM	1:01.84	BB+1.85s to A	2023-05-13	2023 MR NYS Spring Frenzy Invitational slow pool
200 Freestyle	SCM	2:13.64	BB+2.65s to A	2023-05-12	2023 MR NYS Spring Frenzy Invitational slow pool
100 Backstroke	SCM	1:10.45	BB+4.66s to A	2023-05-13	2023 MR NYS Spring Frenzy Invitational slow pool
100 Butterfly	SCM	1:08.81	BB+3.72s to A	2023-05-12	2023 MR NYS Spring Frenzy Invitational slow pool
200 Butterfly	SCM	2:31.37	BB+5.58s to A	2023-05-13	2023 MR NYS Spring Frenzy Invitational slow pool
50 Freestyle	LCM	25.64	AAA+0.65s to AAAA	2025-08-09	2025 EZ LC Age Group Championship fast pool
100 Freestyle	LCM	55.55	AAA+1.06s to AAAA	2025-08-06	2025 EZ LC Age Group Championship fast pool
200 Freestyle	LCM	2:01.27	AAA+1.28s to AAAA	2025-08-07	2025 EZ LC Age Group Championship fast pool
400 Freestyle	LCM	4:24.06	AAA+8.47s to AAAA	2025-11-16	2025 NC SwimMAC November LC SC Invitational venue
800 Freestyle	LCM	10:16.14	BB+12.25s to A	2023-01-01	nys 16june2023
100 Backstroke	LCM	1:02.58	AAA+1.69s to AAAA	2025-11-16	2025 NC SwimMAC November LC SC Invitational venue
200 Backstroke	LCM	2:15.51	AAA+3.32s to AAAA	2025-11-15	2025 NC SwimMAC November LC SC Invitational venue
100 Butterfly	LCM	1:03.00	AA+1.31s to AAA	2024-08-08	2024 EZ LC Age Group Championship venue
200 Butterfly	LCM	2:20.88	AA+2.89s to AAA	2025-11-16	2025 NC SwimMAC November LC SC Invitational venue
200 Individual Medley	LCM	2:18.40	AAA+4.31s to AAAA	2025-08-06	2025 EZ LC Age Group Championship fast pool
400 Individual Medley	LCM	5:01.02	AAA+12.83s to AAAA	2025-08-07	2025 EZ LC Age Group Championship fast pool

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 15.

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	2025-03-30	2025 EZ North Speedo Short Course Sectionals
50 Freestyle	SCY	22.55	flying	200 Free Relay (leg 4)	2025-04-04	2025 Eastern Zone SC Age Group Championships
200 Freestyle	SCY	1:49.45	flying	800 Free Relay (leg 3)	2025-03-28	2025 EZ North Speedo Short Course Sectionals
50 Backstroke	SCY	24.23	flat	200 Medley Relay	2026-03-28	2026 EZ North Speedo Short Course Sectionals
100 Backstroke	SCY	55.37	flat	400 Medley Relay	2025-03-30	2025 EZ North Speedo Short Course Sectionals
50 Butterfly	SCY	24.26	flying	200 Medley Relay (leg 3)	2025-03-29	2025 EZ North Speedo Short Course Sectionals

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 15-16 · LCM

4167 points (5/6 events — incomplete)

Event	Time	Points
400 FR LCM	4:24.06	854
200 BK LCM	2:15.51	866
200 FL LCM	2:20.88	764
200 IM LCM	2:18.40	869
400 IM LCM	5:01.02	814
200 BR LCM	—	0

IMR 15-16 · SCY

3505 points (4/5 events — incomplete)

Event	Time	Points
200 FR SCY	1:45.05	915
100 BK SCY	51.46	955
100 FL SCY	54.46	792
200 IM SCY	1:59.78	843
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 1:45.05

24.59

26.44

26.94

27.08

Front half 51.03s · back half 54.02s

100 Backstroke SCY 51.46 RT 0.50s

25.05

26.41

Front half 25.05s · back half 26.41s

200 Backstroke SCY 1:52.39 RT 0.52s

26.89

28.65

28.52

28.33

Front half 55.54s · back half 56.85s

200 Butterfly SCY 1:59.37

26.70

30.01

31.06

31.60

Front half 56.71s · back half 62.66s

200 Individual Medley SCY 1:59.78

25.57

30.46

35.94

27.81

Front half 56.03s · back half 63.75s

100 Freestyle SCM 1:01.84

29.53

32.31

Front half 29.53s · back half 32.31s

200 Freestyle SCM 2:13.64

30.56

34.52

34.78

33.78

Front half 65.08s · back half 68.56s

100 Backstroke SCM 1:10.45

33.85

36.60

Front half 33.85s · back half 36.60s

100 Butterfly SCM 1:08.81

31.97

36.84

Front half 31.97s · back half 36.84s

200 Butterfly SCM 2:31.37

33.18

37.65

39.63

40.91

Front half 70.83s · back half 80.54s

100 Freestyle LCM 55.55

26.70

28.85

Front half 26.70s · back half 28.85s

200 Freestyle LCM 2:01.27

28.20

31.07

30.87

31.13

Front half 59.27s · back half 62.00s

400 Freestyle LCM 4:24.06

30.51

33.38

33.84

34.02

33.78

33.56

33.08

31.89

Front half 131.75s · back half 132.31s

100 Backstroke LCM 1:02.58

30.65

31.93

Front half 30.65s · back half 31.93s

200 Backstroke LCM 2:15.51

31.68

34.23

34.77

34.83

Front half 65.91s · back half 69.60s

100 Butterfly LCM 1:03.00

29.54

33.46

Front half 29.54s · back half 33.46s

200 Butterfly LCM 2:20.88

31.47

35.63

36.20

37.58

Front half 67.10s · back half 73.78s

200 Individual Medley LCM 2:18.40

29.49

35.10

41.76

32.05

Front half 64.59s · back half 73.81s

400 Individual Medley LCM 5:01.02

31.17

35.42

38.62

38.24

46.02

45.87

34.32

31.36

Front half 143.45s · back half 157.57s

Reaction time

fastest 0.39s average 0.490s slowest 0.52s 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 22.45 7 swims

100 Freestyle SCY 48.72 4 swims

200 Freestyle SCY 1:45.05 3 swims

1000 Freestyle SCY 10:12.06 2 swims

50 Backstroke SCY 23.98 2 swims

100 Backstroke SCY 51.46 8 swims

200 Backstroke SCY 1:52.39 7 swims

100 Butterfly SCY 54.46 3 swims

200 Butterfly SCY 1:59.37 5 swims

200 Individual Medley SCY 1:59.78 5 swims

50 Freestyle SCM 28.54 1 swim

100 Freestyle SCM 1:01.84 1 swim

200 Freestyle SCM 2:13.64 1 swim

100 Backstroke SCM 1:10.45 1 swim

100 Butterfly SCM 1:08.81 1 swim

200 Butterfly SCM 2:31.37 1 swim

50 Freestyle LCM 25.64 6 swims

100 Freestyle LCM 55.55 4 swims

200 Freestyle LCM 2:01.27 4 swims

400 Freestyle LCM 4:24.06 3 swims

800 Freestyle LCM 10:16.14 2 swims

100 Backstroke LCM 1:02.58 5 swims

200 Backstroke LCM 2:15.51 7 swims

100 Butterfly LCM 1:03.00 5 swims

200 Butterfly LCM 2:20.88 3 swims

200 Individual Medley LCM 2:18.40 6 swims

400 Individual Medley LCM 5:01.02 2 swims