Iason Cho

Mage 15LEUTCWHEATHUDLELEZTNS

379 plausible swims · 61 meets · 2017-07-01 → 2026-01-01

Personal records

Event	Course	Best	Cut	Date	Meet
50 Freestyle	SCY	23.16	AA+0.47s to AAA	2021-11-20	The 2021 Mark J. Braun Fall Classic venue
100 Freestyle	SCY	51.22	AA+1.43s to AAA	2020-10-25	Stevie Greishammer Meet venue
200 Freestyle	SCY	1:45.61	AAA+1.82s to AAAA	2023-03-24	2023 Four Corners Speedo Sectionals - Austin venue
500 Freestyle	SCY	4:48.31	AAA+6.02s to AAAA	2023-03-25	2023 Four Corners Speedo Sectionals - Austin venue
1000 Freestyle	SCY	10:04.69	AAA+16.90s to AAAA	2023-03-23	2023 Four Corners Speedo Sectionals - Austin venue
1650 Freestyle	SCY	17:21.44	AA+13.95s to AAA	2020-10-18	2020 TCAT Mile Meet slow pool
50 Backstroke	SCY	30.92	B+0.63s to BB	2018-12-02	Shaker Shark Invitational venue
100 Backstroke	SCY	53.70	AAA+1.61s to AAAA	2023-03-24	2023 Four Corners Speedo Sectionals - Austin venue
200 Backstroke	SCY	1:58.33	AAA+4.44s to AAAA	2023-03-25	2023 Four Corners Speedo Sectionals - Austin venue
100 Breaststroke	SCY	1:07.57	BB+0.18s to A	2020-01-18	2020 Jim Scullion Age Group Showdown venue
200 Breaststroke	SCY	2:37.59	BB+10.60s to A	2019-11-03	Kelly Kinney Memorial - Splash Out Cancer venue
50 Butterfly	SCY	30.06	BB+2.27s to A	2018-11-18	The 2018 Mark J. Braun Fall Classic venue
100 Butterfly	SCY	56.82	A+0.43s to AA	2021-03-05	LESI Senior Champs
200 Butterfly	SCY	2:11.61	A+5.12s to AA	2020-02-23	2020 MRST Regional Age Group Champs venue
100 Individual Medley	SCY	1:04.97		2018-12-01	Shaker Shark Invitational venue
200 Individual Medley	SCY	1:58.16	AAA+2.47s to AAAA	2023-03-26	2023 Four Corners Speedo Sectionals - Austin venue
400 Individual Medley	SCY	4:20.61	AA+0.12s to AAA	2021-03-05	LESI Senior Champs venue
50 Freestyle	LCM	26.95	AA+0.76s to AAA	2021-05-16	Robert F. Busbey Invitational venue
100 Freestyle	LCM	56.75	AAA+2.26s to AAAA	2021-07-18	2021 Speedo Sectional Meet venue
200 Freestyle	LCM	2:05.06	AAA+5.07s to AAAA	2021-08-01	LESI Senior Champs venue
400 Freestyle	LCM	4:30.92	AA+3.13s to AAA	2021-06-18	Holtrey Summer Classic venue
800 Freestyle	LCM	9:22.66	AA+9.07s to AAA	2021-06-06	2021 CCS Age Group & Open LC Meet venue
1500 Freestyle	LCM	17:38.14	AAA+38.95s to AAAA	2021-06-04	2021 CCS Age Group & Open LC Meet venue
50 Backstroke	LCM	29.89	AAA+0.90s to AAAA	2021-07-02	2021 TCAT Midsummer Swim Meet venue
100 Backstroke	LCM	1:03.37	AAA+2.48s to AAAA	2021-07-30	LESI Senior Champs venue
200 Backstroke	LCM	2:18.49	AAA+6.30s to AAAA	2021-06-19	Holtrey Summer Classic venue
50 Breaststroke	LCM	43.69	+1.10s to B	2018-05-12	Penguin LC Season Opener venue
100 Breaststroke	LCM	1:18.08	A+2.99s to AA	2021-06-20	Holtrey Summer Classic venue
200 Breaststroke	LCM	2:51.68	BB+0.29s to A	2021-07-03	2021 TCAT Midsummer Swim Meet venue
50 Butterfly	LCM	29.01	AA+0.32s to AAA	2021-07-30	LESI Senior Champs venue
100 Butterfly	LCM	1:05.35	A+0.86s to AA	2021-05-08	Lake Erie Swimming LC Championship Meet
200 Butterfly	LCM	2:31.48	BB+0.89s to A	2021-06-05	2021 CCS Age Group & Open LC Meet venue
200 Individual Medley	LCM	2:20.81	AA+0.32s to AAA	2021-07-30	LESI Senior Champs venue
400 Individual Medley	LCM	5:08.98	AA+7.09s to AAA	2021-06-19	Holtrey Summer Classic venue

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	26.58	flat	200 Free Relay	2017-12-03	Shaker Shark Invitational
50 Freestyle	SCY	24.07	flying	200 Free Relay (leg 4)	2020-02-28	Lake Erie Junior Olympic Championship Meet
100 Freestyle	SCY	52.04	flying	400 Free Relay (leg 4)	2020-02-29	Lake Erie Junior Olympic Championship Meet
50 Backstroke	SCY	28.51	flat	200 Medley Relay	2019-12-08	Shaker Shark Invitational
100 Backstroke	SCY	54.02	flat	400 Medley Relay	2021-11-20	The 2021 Mark J. Braun Fall Classic
50 Butterfly	SCY	30.93	flying	200 Medley Relay (leg 3)	2018-03-10	Lake Erie Age Group Championship Meet
50 Freestyle	LCM	31.34	flying	200 Free Relay (leg 2)	2018-06-15	2018 Jerry Holtrey Summer Classic
50 Freestyle	LCM	30.71	flying	200 Medley Relay (leg 4)	2018-06-16	2018 Jerry Holtrey Summer Classic
100 Freestyle	LCM	1:04.40	flat	400 Free Relay	2019-05-19	2019 Robert F. Busbey Invitational
100 Freestyle	LCM	57.13	flying	400 Free Relay (leg 3)	2021-08-01	LESI Senior Champs
200 Freestyle	LCM	2:03.12	flying	800 Free Relay (leg 2)	2021-07-30	LESI Senior Champs
100 Backstroke	LCM	1:05.24	flat	400 Medley Relay	2021-05-15	Robert F. Busbey Invitational
50 Butterfly	LCM	1:17.06	flying	200 Medley Relay (leg 3)	2018-06-03	2018 CCS Age Group & Open LC Meet
100 Butterfly	LCM	1:02.97	flying	400 Medley Relay (leg 3)	2021-06-18	Holtrey Summer Classic

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 · SCY

4502 points (6/6 events)

Event	Time	Points
500 FR SCY	4:48.31	880
200 BK SCY	1:58.33	818
200 BR SCY	2:37.59	502
200 FL SCY	2:11.61	627
200 IM SCY	1:58.16	879
400 IM SCY	4:20.61	796

IMR 15-16 · SCY

3939 points (5/5 events)

Event	Time	Points
200 FR SCY	1:45.61	900
100 BK SCY	53.70	841
100 BR SCY	1:07.57	622
100 FL SCY	56.82	697
200 IM SCY	1:58.16	879

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

PR splits

100 Freestyle SCY 51.22

25.12

26.10

Front half 25.12s · back half 26.10s

200 Freestyle SCY 1:45.61

24.70

26.22

27.13

27.56

Front half 50.92s · back half 54.69s

500 Freestyle SCY 4:48.31

25.79

28.11

28.60

29.06

29.20

29.38

29.64

29.82

29.33

Front half 140.76s · back half 147.55s

1000 Freestyle SCY 10:04.69

25.42

27.76

28.88

29.30

29.75

30.12

30.43

30.60

30.77

30.78

30.77

31.25

31.14

31.08

31.27

30.98

31.45

31.13

31.35

30.46

Front half 293.81s · back half 310.88s

1650 Freestyle SCY 17:21.44

27.90

30.24

30.94

31.22

30.98

31.22

31.43

31.42

31.61

31.50

31.35

31.70

31.43

31.50

31.67

31.34

32.08

32.16

32.53

32.51

32.26

32.23

32.17

31.54

32.23

32.33

32.26

31.79

31.36

32.24

32.29

31.83

30.18

100 Backstroke SCY 53.70

25.86

27.84

Front half 25.86s · back half 27.84s

200 Backstroke SCY 1:58.33

27.31

29.53

30.32

31.17

Front half 56.84s · back half 61.49s

100 Breaststroke SCY 1:07.57

32.38

35.19

Front half 32.38s · back half 35.19s

200 Breaststroke SCY 2:37.59

36.02

39.65

40.76

41.16

Front half 75.67s · back half 81.92s

200 Butterfly SCY 2:11.61

28.19

32.07

34.53

36.82

Front half 60.26s · back half 71.35s

100 Individual Medley SCY 1:04.97

30.05

34.92

Front half 30.05s · back half 34.92s

200 Individual Medley SCY 1:58.16

25.38

29.14

35.73

27.91

Front half 54.52s · back half 63.64s

400 Individual Medley SCY 4:20.61

26.84

29.81

32.27

31.70

38.61

39.59

31.21

30.58

Front half 120.62s · back half 139.99s

100 Freestyle LCM 56.75

27.29

56.75

82.74

111.38

138.32

169.37

196.49

56.75

200 Freestyle LCM 2:05.06

29.21

32.09

31.96

31.80

Front half 61.30s · back half 63.76s

400 Freestyle LCM 4:30.92

30.03

33.06

33.68

34.77

34.57

35.74

34.85

34.22

Front half 131.54s · back half 139.38s

1500 Freestyle LCM 17:38.14

31.50

33.93

30.06

39.64

35.41

35.57

35.49

35.48

35.77

35.76

35.48

35.33

35.68

35.64

35.80

36.06

35.43

35.50

33.45

37.61

35.40

35.15

35.76

35.46

35.69

35.30

35.83

35.46

35.44

34.06

Front half 526.54s · back half 531.60s

100 Backstroke LCM 1:03.37

30.46

32.91

Front half 30.46s · back half 32.91s

200 Backstroke LCM 2:18.49

31.28

33.93

36.61

36.67

Front half 65.21s · back half 73.28s

100 Breaststroke LCM 1:18.08

36.69

41.39

Front half 36.69s · back half 41.39s

200 Breaststroke LCM 2:51.68

39.43

43.71

43.96

44.58

Front half 83.14s · back half 88.54s

200 Butterfly LCM 2:31.48

32.66

37.49

39.50

41.83

Front half 70.15s · back half 81.33s

200 Individual Medley LCM 2:20.81

30.46

35.12

42.94

32.29

Front half 65.58s · back half 75.23s

400 Individual Medley LCM 5:08.98

31.62

36.73

39.53

38.29

45.59

46.30

36.21

34.71

Front half 146.17s · back half 162.81s

Progression

Faster times are higher. One card per event, all courses & history.

50 Freestyle SCY 23.16 17 swims

100 Freestyle SCY 51.22 17 swims

200 Freestyle SCY 1:45.61 18 swims

500 Freestyle SCY 4:48.31 13 swims

1000 Freestyle SCY 10:04.69 1 swim

1650 Freestyle SCY 17:21.44 1 swim

50 Backstroke SCY 30.92 7 swims

100 Backstroke SCY 53.70 24 swims

200 Backstroke SCY 1:58.33 24 swims

100 Breaststroke SCY 1:07.57 12 swims

200 Breaststroke SCY 2:37.59 6 swims

50 Butterfly SCY 30.06 2 swims

100 Butterfly SCY 56.82 12 swims

200 Butterfly SCY 2:11.61 5 swims

100 Individual Medley SCY 1:04.97 8 swims

200 Individual Medley SCY 1:58.16 23 swims

400 Individual Medley SCY 4:20.61 6 swims

50 Freestyle LCM 26.95 17 swims

100 Freestyle LCM 56.75 14 swims

200 Freestyle LCM 2:05.06 16 swims

400 Freestyle LCM 4:30.92 8 swims

800 Freestyle LCM 9:22.66 3 swims

1500 Freestyle LCM 17:38.14 4 swims

50 Backstroke LCM 29.89 10 swims

100 Backstroke LCM 1:03.37 24 swims

200 Backstroke LCM 2:18.49 14 swims

50 Breaststroke LCM 43.69 2 swims

100 Breaststroke LCM 1:18.08 11 swims

200 Breaststroke LCM 2:51.68 9 swims

50 Butterfly LCM 29.01 9 swims

100 Butterfly LCM 1:05.35 14 swims

200 Butterfly LCM 2:31.48 4 swims

200 Individual Medley LCM 2:20.81 17 swims

400 Individual Medley LCM 5:08.98 7 swims