Swimmer profile
Mackenzie Duncan
Female15-16Lake Erie Silver DolphinsOH · CENTRAL
SeasonUSA Swimming season runs Sept – Aug
Event
2018–19
2019–20
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free SCY
39.09
33.82
▲ 5.27
33.26
▲ 0.56
28.76
▲ 4.50
28.43
▲ 0.33
26.65
▲ 1.78
25.60
▲ 1.05
25.20
▲ 0.40
100 Free SCY
1:27.72
1:13.70
▲ 14.02
1:17.18
▼ 3.48
1:04.17
▲ 13.01
1:01.28
▲ 2.89
57.68
▲ 3.60
56.11
▲ 1.57
55.50
▲ 0.61
200 Free SCY
—
2:40.31
2:38.30
▲ 2.01
2:25.56
▲ 12.74
2:08.56
▲ 17.00
2:04.58
▲ 3.98
2:04.38
▲ 0.20
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500 Free SCY
—
7:44.33
—
6:16.19
▲ 88.14
5:45.34
▲ 30.85
5:32.36
▲ 12.98
5:43.09
▼ 10.73
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1000 Free SCY
—
—
—
—
12:16.49
11:38.70
▲ 37.79
—
—
1650 Free SCY
—
—
—
—
20:27.06
19:20.01
▲ 67.05
—
—
50 Back SCY
46.23
38.28
▲ 7.95
37.72
▲ 0.56
33.09
▲ 4.63
30.35
▲ 2.74
29.30
▲ 1.05
28.20
▲ 1.10
26.85
▲ 1.35
100 Back SCY
1:52.03
1:24.13
▲ 27.90
1:21.42
▲ 2.71
1:10.30
▲ 11.12
1:05.23
▲ 5.07
1:02.59
▲ 2.64
59.98
▲ 2.61
57.30
▲ 2.68
200 Back SCY
—
—
2:53.29
2:30.86
▲ 22.43
2:21.24
▲ 9.62
2:16.01
▲ 5.23
2:09.96
▲ 6.05
2:03.56
▲ 6.40
50 Breast SCY
1:06.01
44.93
▲ 21.08
43.07
▲ 1.86
40.66
▲ 2.41
39.36
▲ 1.30
36.64
▲ 2.72
—
—
100 Breast SCY
—
1:42.91
1:31.83
▲ 11.08
1:27.77
▲ 4.06
1:21.57
▲ 6.20
1:17.35
▲ 4.22
1:18.17
▼ 0.82
1:12.44
▲ 5.73
200 Breast SCY
—
—
3:26.85
—
2:58.03
▲ 28.82
2:48.84
▲ 9.19
2:47.72
▲ 1.12
—
50 Fly SCY
—
37.75
37.13
▲ 0.62
33.85
▲ 3.28
32.39
▲ 1.46
29.82
▲ 2.57
—
—
100 Fly SCY
—
1:36.34
—
1:21.70
▲ 14.64
1:10.25
▲ 11.45
1:09.39
▲ 0.86
1:08.43
▲ 0.96
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200 Fly SCY
—
—
—
—
—
—
2:33.48
—
100 IM SCY
1:56.12
1:24.78
▲ 31.34
1:21.92
▲ 2.86
1:11.27
▲ 10.65
1:07.32
▲ 3.95
1:05.51
▲ 1.81
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—
200 IM SCY
—
2:57.86
2:50.59
▲ 7.27
2:37.05
▲ 13.54
2:26.22
▲ 10.83
2:22.03
▲ 4.19
2:16.61
▲ 5.42
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400 IM SCY
—
—
—
—
—
5:00.28
4:47.53
▲ 12.75
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Improvement<0.5s0.5–2s2–5s5s+Slower
📊 All Attempts by Event
Chronological history of every recorded swim. Click an event to expand its attempt list.