Mackenzie Duncan

Fage 15CZLEMIBBALESDNCATSTRSULESDUNUNAT

481 plausible swims · 88 meets · 2019-01-27 → 2026-03-28

Personal records

Event	Course	Best	Cut	Date	Meet
25 Freestyle	SCY	15.36		2020-02-16	LESI 8 & U Championships 2020 venue
50 Freestyle	SCY	25.60	AA+0.21s to AAA	2025-03-07	2025 Winter LE Age Group Championship
100 Freestyle	SCY	56.11	AA+1.02s to AAA	2025-03-07	2025 Winter LE Age Group Championship
200 Freestyle	SCY	2:04.38	A+0.09s to AA	2025-03-08	2025 Winter LE Age Group Championship venue
500 Freestyle	SCY	5:39.62	A+4.33s to AA	2024-03-09	Lake Erie Age Group Championships fast pool
1000 Freestyle	SCY	11:38.70	A+8.81s to AA	2023-11-19	The 2023 Mark J. Braun Fall Classic venue
1650 Freestyle	SCY	19:20.01	AA+43.52s to AAA	2023-11-17	The 2023 Mark J. Braun Fall Classic venue
25 Backstroke	SCY	18.63		2019-12-15	2019 Winter Breakout Meet slow pool
50 Backstroke	SCY	29.30	AA+1.11s to AAA	2024-03-10	Lake Erie Age Group Championships fast pool
100 Backstroke	SCY	59.98	AA+0.29s to AAA	2025-03-08	2025 Winter LE Age Group Championship venue
200 Backstroke	SCY	2:09.96	AA+0.47s to AAA	2025-03-09	2025 Winter LE Age Group Championship venue
25 Breaststroke	SCY	22.28		2019-12-15	2019 Winter Breakout Meet slow pool
50 Breaststroke	SCY	36.64	BB+0.75s to A	2023-11-18	The 2023 Mark J. Braun Fall Classic venue
100 Breaststroke	SCY	1:17.35	BB+2.36s to A	2024-02-04	Last Chance Meet venue
200 Breaststroke	SCY	2:47.72	BB+6.43s to A	2025-02-09	Last Chance Meet venue
25 Butterfly	SCY	16.39		2020-02-16	LESI 8 & U Championships 2020 venue
50 Butterfly	SCY	29.82	A+0.83s to AA	2023-12-03	2023 NCAT Winter Invite venue
100 Butterfly	SCY	1:09.39	BB+4.40s to A	2023-10-01	LESD 2022 Season Opener Meet venue
200 Butterfly	SCY	2:33.48	BB+9.29s to A	2025-02-09	Last Chance Meet venue
100 Individual Medley	SCY	1:05.51		2024-03-09	Lake Erie Age Group Championships fast pool
200 Individual Medley	SCY	2:16.61	AA+3.92s to AAA	2025-03-09	2025 Winter LE Age Group Championship venue
400 Individual Medley	SCY	4:47.53	AA+2.44s to AAA	2025-03-07	2025 Winter LE Age Group Championship venue
50 Freestyle	LCM	29.23	AA+0.24s to AAA	2026-03-28	2026 Central Zone East Spring Speedo Sectiona venue
100 Freestyle	LCM	1:06.31	A+1.02s to AA	2024-07-25	2024 LE Age Group and Senior LC Championships
200 Freestyle	LCM	2:20.56	AA+5.07s to AAA	2024-07-27	2024 LE Age Group and Senior LC Championships venue
400 Freestyle	LCM	5:01.12	A+3.03s to AA	2024-07-27	2024 LE Age Group and Senior LC Championships venue
800 Freestyle	LCM	10:28.31	A+14.12s to AA	2021-06-18	Holtrey Summer Classic
1500 Freestyle	LCM	19:54.25	A+17.96s to AA	2021-06-18	Holtrey Summer Classic
50 Backstroke	LCM	32.18	AAA+0.39s to AAAA	2026-03-27	2026 Central Zone East Spring Speedo Sectiona venue
100 Backstroke	LCM	1:10.73	AA+1.34s to AAA	2024-07-28	2024 LE Age Group and Senior LC Championships venue
200 Backstroke	LCM	2:31.76	AA+2.57s to AAA	2024-07-25	2024 LE Age Group and Senior LC Championships
50 Breaststroke	LCM	45.51	B+1.82s to BB	2022-06-19	Holtrey Summer Classic venue
100 Breaststroke	LCM	1:32.63	BB+6.74s to A	2024-07-13	2024 Grizzly Summer Sizzler venue
200 Breaststroke	LCM	3:15.42	BB+9.63s to A	2024-07-14	2024 Grizzly Summer Sizzler venue
50 Butterfly	LCM	35.43	BB+1.34s to A	2023-05-21	2023 Robert F. Busbey Invitational venue
100 Butterfly	LCM	1:17.34	BB+3.85s to A	2024-05-11	2024 NCAT TYR LC Age Group & Open venue
200 Butterfly	LCM	2:57.84	B+0.55s to BB	2024-07-13	2024 Grizzly Summer Sizzler venue
200 Individual Medley	LCM	2:40.16	A+0.37s to AA	2024-07-26	2024 LE Age Group and Senior LC Championships venue
400 Individual Medley	LCM	5:35.18	AA+9.89s to AAA	2024-07-25	2024 LE Age Group and Senior LC Championships 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	25.24	flying	200 Free Relay (leg 3)	2025-03-07	2025 Winter LE Age Group Championship
100 Freestyle	SCY	57.19	flying	400 Free Relay (leg 3)	2025-03-08	2025 Winter LE Age Group Championship
50 Backstroke	SCY	28.43	flat	200 Medley Relay	2025-03-07	2025 Winter LE Age Group Championship
100 Backstroke	SCY	1:02.62	flat	400 Medley Relay	2025-03-09	2025 Winter LE Age Group Championship
50 Breaststroke	SCY	39.17	flying	200 Medley Relay (leg 2)	2022-03-13	2022 Lake Erie SC Winter JO and 8U Champs
50 Freestyle	LCM	41.12	flying	200 Free Relay (leg 4)	2019-07-19	2019 Lake Erie LC Age Group Championship Meet
100 Butterfly	LCM	1:24.81	flying	400 Medley Relay (leg 3)	2023-05-21	2023 Robert F. Busbey Invitational

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

4173 points (6/6 events)

Event	Time	Points
500 FR SCY	5:39.62	694
200 BK SCY	2:09.96	820
200 BR SCY	2:47.72	575
200 FL SCY	2:33.48	532
200 IM SCY	2:16.61	758
400 IM SCY	4:47.53	794

IMR 15-16 · SCY

3399 points (5/5 events)

Event	Time	Points
200 FR SCY	2:04.38	726
100 BK SCY	59.98	817
100 BR SCY	1:17.35	579
100 FL SCY	1:09.39	519
200 IM SCY	2:16.61	758

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

PR splits

200 Freestyle SCY 2:04.38

28.36

31.84

32.61

31.57

Front half 60.20s · back half 64.18s

500 Freestyle SCY 5:39.62

30.03

33.17

33.92

34.42

34.31

34.23

35.01

35.00

35.32

34.21

Front half 165.85s · back half 173.77s

1650 Freestyle SCY 19:20.01

29.41

33.83

34.50

34.45

34.47

34.81

34.90

35.03

35.26

35.50

35.58

35.79

35.56

35.42

35.63

35.56

35.61

35.95

35.55

35.89

35.51

35.68

35.62

35.93

35.82

35.89

35.75

36.04

35.76

35.81

35.49

35.36

32.65

100 Backstroke SCY 59.98

29.17

30.81

Front half 29.17s · back half 30.81s

200 Backstroke SCY 2:09.96

30.69

33.04

33.58

32.65

Front half 63.73s · back half 66.23s

100 Breaststroke SCY 1:17.35

36.76

40.59

Front half 36.76s · back half 40.59s

200 Breaststroke SCY 2:47.72

38.65

43.46

43.17

42.44

Front half 82.11s · back half 85.61s

100 Butterfly SCY 1:09.39

31.94

37.45

Front half 31.94s · back half 37.45s

200 Butterfly SCY 2:33.48

33.43

38.88

40.90

40.27

Front half 72.31s · back half 81.17s

100 Individual Medley SCY 1:05.51

30.46

35.05

Front half 30.46s · back half 35.05s

200 Individual Medley SCY 2:16.61

30.15

34.32

41.59

30.55

Front half 64.47s · back half 72.14s

400 Individual Medley SCY 4:47.53

30.97

36.18

36.24

34.80

42.99

42.43

32.90

31.02

Front half 138.19s · back half 149.34s

200 Freestyle LCM 2:20.56

33.20

35.82

36.94

34.60

Front half 69.02s · back half 71.54s

400 Freestyle LCM 5:01.12

33.18

38.90

37.02

39.72

37.66

39.54

37.33

37.77

Front half 148.82s · back half 152.30s

100 Backstroke LCM 1:10.73

33.42

37.31

Front half 33.42s · back half 37.31s

100 Breaststroke LCM 1:32.63

43.83

48.80

Front half 43.83s · back half 48.80s

200 Breaststroke LCM 3:15.42

45.76

50.41

50.15

49.10

Front half 96.17s · back half 99.25s

100 Butterfly LCM 1:17.34

36.71

40.63

Front half 36.71s · back half 40.63s

200 Butterfly LCM 2:57.84

38.29

45.79

48.26

45.50

Front half 84.08s · back half 93.76s

200 Individual Medley LCM 2:40.16

34.70

39.59

49.95

35.92

Front half 74.29s · back half 85.87s

400 Individual Medley LCM 5:35.18

35.13

41.59

42.31

39.82

51.95

48.60

38.85

36.93

Front half 158.85s · back half 176.33s

Progression

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

25 Freestyle SCY 15.36 5 swims

50 Freestyle SCY 25.60 28 swims

100 Freestyle SCY 56.11 17 swims

200 Freestyle SCY 2:04.38 21 swims

500 Freestyle SCY 5:39.62 12 swims

1000 Freestyle SCY 11:38.70 1 swim

1650 Freestyle SCY 19:20.01 1 swim

25 Backstroke SCY 18.63 1 swim

50 Backstroke SCY 29.30 28 swims

100 Backstroke SCY 59.98 22 swims

200 Backstroke SCY 2:09.96 17 swims

25 Breaststroke SCY 22.28 1 swim

50 Breaststroke SCY 36.64 18 swims

100 Breaststroke SCY 1:17.35 16 swims

200 Breaststroke SCY 2:47.72 3 swims

25 Butterfly SCY 16.39 2 swims

50 Butterfly SCY 29.82 19 swims

100 Butterfly SCY 1:09.39 5 swims

200 Butterfly SCY 2:33.48 1 swim

100 Individual Medley SCY 1:05.51 18 swims

200 Individual Medley SCY 2:16.61 18 swims

400 Individual Medley SCY 4:47.53 3 swims

50 Freestyle LCM 29.23 21 swims

100 Freestyle LCM 1:06.31 25 swims

200 Freestyle LCM 2:20.56 21 swims

400 Freestyle LCM 5:01.12 12 swims

800 Freestyle LCM 10:28.31 6 swims

1500 Freestyle LCM 19:54.25 4 swims

50 Backstroke LCM 32.18 20 swims

100 Backstroke LCM 1:10.73 26 swims

200 Backstroke LCM 2:31.76 17 swims

50 Breaststroke LCM 45.51 8 swims

100 Breaststroke LCM 1:32.63 15 swims

200 Breaststroke LCM 3:15.42 5 swims

50 Butterfly LCM 35.43 9 swims

100 Butterfly LCM 1:17.34 7 swims

200 Butterfly LCM 2:57.84 1 swim

200 Individual Medley LCM 2:40.16 22 swims

400 Individual Medley LCM 5:35.18 5 swims