Matthew Ko

Mage 10COSEAAC

292 plausible swims · 50 meets · 2023-03-11 → 2026-06-28

Personal records

Event	Course	Best	Cut	Date	Meet
25 Freestyle	SCY	17.17		2025-01-05	2025 CO AAC 12&U Sprint Eliminator Invit venue
50 Freestyle	SCY	32.03	BB+0.84s to A	2026-03-01	2026 CO CSI SC Age Group Championships fast pool
100 Freestyle	SCY	1:11.41	BB+1.22s to A	2026-01-17	2026 HSA TYR Invitational venue
200 Freestyle	SCY	2:37.34	BB+5.65s to A	2026-01-18	2026 HSA TYR Invitational venue
500 Freestyle	SCY	7:20.11	BB+36.52s to A	2026-01-16	2026 HSA TYR Invitational venue
25 Backstroke	SCY	20.16		2024-11-23	2024 CO CUDA Pentathlon XXXVII venue
50 Backstroke	SCY	38.62	BB+0.83s to A	2025-01-01	2025 CO CSI Pioneer Open
100 Backstroke	SCY	1:29.19	BB+9.30s to A	2025-01-01	2025 CO NJ Pineapple Invite
200 Backstroke	SCY	3:10.36		2025-01-01	Colorado Swimming Championship Meet
25 Breaststroke	SCY	22.31		2024-11-23	2024 CO CUDA Pentathlon XXXVII venue
50 Breaststroke	SCY	40.54	A+0.35s to AA	2026-02-27	2026 CO CSI SC Age Group Championships fast pool
100 Breaststroke	SCY	1:31.47	A+3.78s to AA	2026-01-18	2026 HSA TYR Invitational venue
200 Breaststroke	SCY	3:31.50		2025-01-01	2025 CO AQUA, AAC, DSA Tri Meet
25 Butterfly	SCY	21.23		2024-11-23	2024 CO CUDA Pentathlon XXXVII venue
50 Butterfly	SCY	37.51	BB+1.42s to A	2026-01-04	2026 CO AAC Sprint Eliminator Invite venue
100 Butterfly	SCY	1:57.87	+3.98s to B	2025-01-01	2025 CO ACES Fall High Point Invite
100 Individual Medley	SCY	1:24.33	BB+4.44s to A	2026-02-28	2026 CO CSI SC Age Group Championships fast pool
200 Individual Medley	SCY	2:56.21	BB+2.72s to A	2026-02-27	2026 CO CSI SC Age Group Championships fast pool
50 Freestyle	LCM	35.42	A+1.03s to AA	2026-06-26	2026 CO Zone 2 District Meet-AAC fast pool
100 Freestyle	LCM	1:18.68	A+1.89s to AA	2026-06-06	2026 CO NJ Summer Solstice Invite fast pool
200 Freestyle	LCM	2:52.32	A+5.93s to AA	2026-06-07	2026 CO NJ Summer Solstice Invite fast pool
400 Freestyle	LCM	6:08.19	BB+1.00s to A	2026-06-28	2026 CO Zone 2 District Meet-AAC fast pool
50 Backstroke	LCM	44.15	BB+1.06s to A	2026-06-28	2026 CO Zone 2 District Meet-AAC fast pool
100 Backstroke	LCM	1:34.07	BB+1.78s to A	2026-06-27	2026 CO Zone 2 District Meet-AAC fast pool
200 Backstroke	LCM	3:40.95		2025-06-27	2025 CO Zone 2 VMAC Meet venue
50 Breaststroke	LCM	45.11	AA+1.52s to AAA	2026-06-06	2026 CO NJ Summer Solstice Invite fast pool
100 Breaststroke	LCM	1:38.66	AA+2.17s to AAA	2026-06-27	2026 CO Zone 2 District Meet-AAC fast pool
200 Breaststroke	LCM	3:40.71		2026-04-26	2026 CO Arena Catch Me If You Can venue
50 Butterfly	LCM	46.22	BB+5.63s to A	2026-04-25	2026 CO Arena Catch Me If You Can venue
100 Butterfly	LCM	2:20.80	+11.21s to B	2025-05-17	2025 CO ACES Spring Invite venue
200 Individual Medley	LCM	3:16.97	A+7.28s to AA	2026-06-27	2026 CO Zone 2 District Meet-AAC fast pool

Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 10.

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	32.07	flying	200 Free Relay (leg 3)	2026-03-01	2026 CO CSI SC Age Group Championships
50 Breaststroke	SCY	40.14	flying	200 Medley Relay (leg 2)	2026-02-28	2026 CO CSI SC Age Group Championships
50 Freestyle	LCM	43.76	flying	200 Free Relay (leg 2)	2024-07-28	2024 CO CSI 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 10 & under · LCM

2946 points (5/5 events)

Event	Time	Points
200 FR LCM	2:52.32	682
100 BK LCM	1:34.07	614
100 BR LCM	1:38.66	802
100 FL LCM	2:20.80	180
200 IM LCM	3:16.97	668

IMR 10 & under · LCM

3153 points (5/5 events)

Event	Time	Points
100 FR LCM	1:18.68	697
50 BK LCM	44.15	588
50 BR LCM	45.11	778
50 FL LCM	46.22	422
200 IM LCM	3:16.97	668

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

PR splits

100 Freestyle SCY 1:11.41

33.91

37.50

Front half 33.91s · back half 37.50s

200 Freestyle SCY 2:37.34

34.62

42.56

41.26

38.90

Front half 77.18s · back half 80.16s

500 Freestyle SCY 7:20.11

36.94

44.47

44.33

45.46

47.07

43.41

45.69

46.43

45.19

41.12

Front half 218.27s · back half 221.84s

100 Breaststroke SCY 1:31.47

42.51

48.96

Front half 42.51s · back half 48.96s

100 Individual Medley SCY 1:24.33

41.99

42.34

Front half 41.99s · back half 42.34s

200 Individual Medley SCY 2:56.21

42.18

46.88

48.75

38.40

Front half 89.06s · back half 87.15s

100 Freestyle LCM 1:18.68

37.64

41.04

Front half 37.64s · back half 41.04s

200 Freestyle LCM 2:52.32

37.73

44.68

45.65

44.26

Front half 82.41s · back half 89.91s

400 Freestyle LCM 6:08.19

41.89

46.80

50.19

47.20

47.98

44.45

47.94

41.74

Front half 186.08s · back half 182.11s

100 Backstroke LCM 1:34.07

46.25

47.82

Front half 46.25s · back half 47.82s

200 Backstroke LCM 3:40.95

53.05

57.96

55.72

54.22

Front half 111.01s · back half 109.94s

100 Breaststroke LCM 1:38.66

47.96

50.70

Front half 47.96s · back half 50.70s

200 Breaststroke LCM 3:40.71

48.05

59.47

56.94

56.25

Front half 107.52s · back half 113.19s

200 Individual Medley LCM 3:16.97

48.01

49.92

57.04

42.00

Front half 97.93s · back half 99.04s

Reaction time

fastest 0.69s average 0.730s slowest 0.77s 2 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 17.17 13 swims

50 Freestyle SCY 32.03 20 swims

100 Freestyle SCY 1:11.41 19 swims

200 Freestyle SCY 2:37.34 6 swims

500 Freestyle SCY 7:20.11 1 swim

25 Backstroke SCY 20.16 12 swims

50 Backstroke SCY 38.62 14 swims

100 Backstroke SCY 1:29.19 8 swims

200 Backstroke SCY 3:10.36 1 swim

25 Breaststroke SCY 22.31 7 swims

50 Breaststroke SCY 40.54 24 swims

100 Breaststroke SCY 1:31.47 15 swims

200 Breaststroke SCY 3:31.50 1 swim

25 Butterfly SCY 21.23 5 swims

50 Butterfly SCY 37.51 8 swims

100 Butterfly SCY 1:57.87 1 swim

100 Individual Medley SCY 1:24.33 16 swims

200 Individual Medley SCY 2:56.21 5 swims

50 Freestyle LCM 35.42 18 swims

100 Freestyle LCM 1:18.68 15 swims

200 Freestyle LCM 2:52.32 6 swims

400 Freestyle LCM 6:08.19 2 swims

50 Backstroke LCM 44.15 16 swims

100 Backstroke LCM 1:34.07 12 swims

200 Backstroke LCM 3:40.95 1 swim

50 Breaststroke LCM 45.11 15 swims

100 Breaststroke LCM 1:38.66 15 swims

200 Breaststroke LCM 3:40.71 3 swims

50 Butterfly LCM 46.22 7 swims

100 Butterfly LCM 2:20.80 1 swim

200 Individual Medley LCM 3:16.97 5 swims