Swimmer profile
Mackenzie Duncan
Female15-16Lake Erie Silver DolphinsOH · CENTRAL
SeasonUSA Swimming season runs Sept – Aug
Event
2018–19
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free LCM
42.31
35.78
▲ 6.53
33.35
▲ 2.43
31.24
▲ 2.11
30.56
▲ 0.68
29.78
▲ 0.78
29.01
▲ 0.77
100 Free LCM
1:34.36
1:19.08
▲ 15.28
1:13.00
▲ 6.08
1:08.17
▲ 4.83
1:06.31
▲ 1.86
1:03.90
▲ 2.41
1:02.09
▲ 1.81
200 Free LCM
3:22.98
2:49.84
▲ 33.14
2:34.37
▲ 15.47
2:27.11
▲ 7.26
2:20.56
▲ 6.55
2:29.15
▼ 8.59
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400 Free LCM
—
5:56.41
5:24.55
▲ 31.86
5:06.51
▲ 18.04
5:01.12
▲ 5.39
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800 Free LCM
—
—
11:11.17
10:24.38
▲ 46.79
10:28.31
▼ 3.93
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—
1500 Free LCM
—
—
—
19:46.12
19:54.25
▼ 8.13
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50 Back LCM
49.56
40.15
▲ 9.41
37.29
▲ 2.86
34.22
▲ 3.07
33.68
▲ 0.54
—
31.28
▲ 2.40
100 Back LCM
1:44.08
1:28.25
▲ 15.83
1:20.71
▲ 7.54
1:15.82
▲ 4.89
1:10.73
▲ 5.09
1:08.61
▲ 2.12
1:08.85
▼ 0.24
200 Back LCM
—
3:12.17
2:48.07
▲ 24.10
2:41.17
▲ 6.90
2:31.76
▲ 9.41
2:31.30
▲ 0.46
2:30.72
▲ 0.58
50 Breast LCM
58.71
49.16
▲ 9.55
45.51
▲ 3.65
—
—
39.87
▲ 5.64
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100 Breast LCM
2:06.84
1:44.59
▲ 22.25
1:37.53
▲ 7.06
1:34.28
▲ 3.25
1:32.63
▲ 1.65
1:23.15
▲ 9.48
1:24.94
▼ 1.79
200 Breast LCM
—
3:42.93
3:24.72
▲ 18.21
—
3:15.42
▲ 9.30
—
—
50 Fly LCM
—
39.49
37.55
▲ 1.94
35.43
▲ 2.12
—
—
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100 Fly LCM
—
1:42.57
1:30.92
▲ 11.65
1:23.31
▲ 7.61
1:17.34
▲ 5.97
1:19.58
▼ 2.24
1:22.15
▼ 2.57
200 Fly LCM
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—
—
—
2:57.84
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200 IM LCM
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3:11.95
2:57.35
▲ 14.60
2:44.34
▲ 13.01
2:40.16
▲ 4.18
2:43.23
▼ 3.07
2:50.44
▼ 7.21
400 IM LCM
—
—
—
6:07.06
5:35.18
▲ 31.88
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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.