Swimmer profile
Dean Ko
MaleOpen / SeniorSan Dimas AquaticsSCS · WESTERNCollege athlete · Claremont-Mudd-ScrippsD3
SeasonUSA Swimming season runs Sept – Aug
Event
2015–16
2016–17
2017–18
2018–19
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free LCM
32.61
32.15
▲ 0.46
31.36
▲ 0.79
29.22
▲ 2.14
26.56
▲ 2.66
26.38
▲ 0.18
—
26.20
▲ 0.18
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26.22
▼ 0.02
100 Free LCM
1:14.36
1:09.49
▲ 4.87
1:07.14
▲ 2.35
1:02.59
▲ 4.55
57.79
▲ 4.80
57.04
▲ 0.75
—
56.85
▲ 0.19
55.16
▲ 1.69
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200 Free LCM
2:35.71
2:31.70
▲ 4.01
2:24.59
▲ 7.11
2:14.88
▲ 9.71
2:04.16
▲ 10.72
2:02.69
▲ 1.47
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400 Free LCM
5:27.08
5:11.53
▲ 15.55
4:57.09
▲ 14.44
4:42.76
▲ 14.33
4:20.77
▲ 21.99
4:17.55
▲ 3.22
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800 Free LCM
—
10:44.47
—
9:36.21
▲ 68.26
—
8:49.47
▲ 46.74
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—
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1500 Free LCM
—
—
—
18:20.44
—
16:55.02
▲ 85.42
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—
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50 Back LCM
36.33
36.43
▼ 0.10
34.53
▲ 1.90
—
29.76
▲ 4.77
29.19
▲ 0.57
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100 Back LCM
1:18.68
1:16.39
▲ 2.29
1:12.48
▲ 3.91
1:07.97
▲ 4.51
1:02.57
▲ 5.40
1:01.03
▲ 1.54
1:00.12
▲ 0.91
1:00.99
▼ 0.87
—
1:01.36
▼ 0.37
200 Back LCM
—
2:43.72
2:34.33
▲ 9.39
2:26.65
▲ 7.68
2:16.31
▲ 10.34
2:11.09
▲ 5.22
2:08.97
▲ 2.12
2:12.28
▼ 3.31
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2:17.49
▼ 5.21
50 Breast LCM
44.10
42.83
▲ 1.27
41.21
▲ 1.62
39.75
▲ 1.46
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100 Breast LCM
1:31.82
1:29.14
▲ 2.68
1:27.77
▲ 1.37
1:19.77
▲ 8.00
—
1:16.14
▲ 3.63
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200 Breast LCM
—
3:09.52
3:05.67
▲ 3.85
2:56.48
▲ 9.19
—
2:36.83
▲ 19.65
2:34.09
▲ 2.74
2:32.86
▲ 1.23
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50 Fly LCM
33.68
33.20
▲ 0.48
32.27
▲ 0.93
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—
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27.31
▲ 4.96
100 Fly LCM
1:13.09
1:13.38
▼ 0.29
1:10.68
▲ 2.70
1:06.67
▲ 4.01
1:00.29
▲ 6.38
59.82
▲ 0.47
58.99
▲ 0.83
58.52
▲ 0.47
59.12
▼ 0.60
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200 Fly LCM
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2:44.99
2:37.06
▲ 7.93
2:24.73
▲ 12.33
2:12.31
▲ 12.42
2:13.20
▼ 0.89
2:09.62
▲ 3.58
2:09.11
▲ 0.51
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200 IM LCM
2:44.25
2:39.84
▲ 4.41
2:32.89
▲ 6.95
2:25.80
▲ 7.09
2:14.15
▲ 11.65
2:10.11
▲ 4.04
2:08.67
▲ 1.44
2:08.54
▲ 0.13
2:13.13
▼ 4.59
2:12.56
▲ 0.57
400 IM LCM
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5:39.59
5:24.93
▲ 14.66
5:04.98
▲ 19.95
4:46.29
▲ 18.69
4:35.94
▲ 10.35
4:37.12
▼ 1.18
4:34.90
▲ 2.22
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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.