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
2019–20
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free SCY
31.12
29.05
▲ 2.07
29.10
▼ 0.05
26.13
▲ 2.97
25.27
▲ 0.86
—
23.89
▲ 1.38
—
22.74
▲ 1.15
—
—
100 Free SCY
1:07.46
1:02.92
▲ 4.54
1:02.69
▲ 0.23
56.58
▲ 6.11
54.74
▲ 1.84
—
51.76
▲ 2.98
49.65
▲ 2.11
—
49.92
▼ 0.27
—
200 Free SCY
2:26.04
2:15.59
▲ 10.45
2:11.61
▲ 3.98
2:04.40
▲ 7.21
1:58.14
▲ 6.26
1:49.31
▲ 8.83
1:51.76
▼ 2.45
1:47.06
▲ 4.70
—
1:53.73
▼ 6.67
—
500 Free SCY
6:10.68
5:46.00
▲ 24.68
5:45.85
▲ 0.15
5:30.80
▲ 15.05
5:09.93
▲ 20.87
4:59.98
▲ 9.95
4:52.08
▲ 7.90
—
4:52.42
▼ 0.34
—
—
1000 Free SCY
—
—
—
11:22.95
10:40.15
▲ 42.80
—
—
9:54.76
▲ 45.39
—
—
—
1650 Free SCY
—
—
—
—
17:45.34
—
—
—
—
—
—
50 Back SCY
34.99
31.72
▲ 3.27
31.58
▲ 0.14
29.11
▲ 2.47
27.66
▲ 1.45
37.25
▼ 9.59
—
—
24.67
▲ 12.58
25.13
▼ 0.46
—
100 Back SCY
1:12.69
1:07.54
▲ 5.15
1:05.65
▲ 1.89
1:01.46
▲ 4.19
59.04
▲ 2.42
53.47
▲ 5.57
54.39
▼ 0.92
52.17
▲ 2.22
52.35
▼ 0.18
52.10
▲ 0.25
53.72
▼ 1.62
200 Back SCY
—
—
2:21.73
2:11.31
▲ 10.42
2:06.26
▲ 5.05
1:56.50
▲ 9.76
1:54.32
▲ 2.18
1:53.41
▲ 0.91
1:54.89
▼ 1.48
1:54.60
▲ 0.29
1:55.35
▼ 0.75
50 Breast SCY
39.55
38.02
▲ 1.53
37.50
▲ 0.52
34.69
▲ 2.81
—
—
—
—
29.68
▲ 5.01
—
—
100 Breast SCY
1:22.22
1:19.88
▲ 2.34
1:16.85
▲ 3.03
1:12.31
▲ 4.54
1:07.94
▲ 4.37
1:02.43
▲ 5.51
—
1:03.36
▼ 0.93
—
—
—
200 Breast SCY
—
—
2:42.84
2:32.40
▲ 10.44
2:21.90
▲ 10.50
—
2:15.08
▲ 6.82
—
—
—
—
50 Fly SCY
30.80
30.24
▲ 0.56
29.40
▲ 0.84
27.29
▲ 2.11
—
—
—
—
24.20
▲ 3.09
—
—
100 Fly SCY
1:07.67
1:06.03
▲ 1.64
1:05.23
▲ 0.80
59.75
▲ 5.48
58.18
▲ 1.57
53.28
▲ 4.90
51.84
▲ 1.44
51.29
▲ 0.55
51.33
▼ 0.04
50.97
▲ 0.36
—
200 Fly SCY
—
—
2:24.51
2:13.64
▲ 10.87
2:05.06
▲ 8.58
1:57.92
▲ 7.14
1:55.55
▲ 2.37
1:52.30
▲ 3.25
1:54.29
▼ 1.99
1:52.59
▲ 1.70
1:52.35
▲ 0.24
100 IM SCY
1:11.14
1:08.12
▲ 3.02
1:06.54
▲ 1.58
1:01.84
▲ 4.70
—
—
—
55.08
▲ 6.76
54.57
▲ 0.51
—
—
200 IM SCY
2:31.58
2:21.63
▲ 9.95
2:19.60
▲ 2.03
2:10.55
▲ 9.05
2:06.26
▲ 4.29
1:56.91
▲ 9.35
1:54.43
▲ 2.48
1:53.63
▲ 0.80
1:52.67
▲ 0.96
1:52.15
▲ 0.52
1:52.78
▼ 0.63
400 IM SCY
—
—
4:54.94
4:36.71
▲ 18.23
4:23.60
▲ 13.11
4:15.36
▲ 8.24
4:05.88
▲ 9.48
4:01.63
▲ 4.25
4:02.99
▼ 1.36
3:59.50
▲ 3.49
4:02.25
▼ 2.75
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.