Swimmer profile
Cillian O'Brien
Male17-18Fox Swim ClubMD · EASTERN
SeasonUSA Swimming season runs Sept – Aug
Event
2016–17
2017–18
2018–19
2019–20
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free SCY
43.52
35.60
▲ 7.92
34.14
▲ 1.46
31.77
▲ 2.37
29.04
▲ 2.73
28.46
▲ 0.58
26.82
▲ 1.64
25.08
▲ 1.74
23.84
▲ 1.24
23.74
▲ 0.10
100 Free SCY
1:35.25
1:22.25
▲ 13.00
—
1:14.55
▲ 7.70
1:06.28
▲ 8.27
1:02.87
▲ 3.41
57.13
▲ 5.74
55.02
▲ 2.11
52.47
▲ 2.55
50.72
▲ 1.75
200 Free SCY
—
—
2:43.05
2:42.90
▲ 0.15
2:29.95
▲ 12.95
2:17.04
▲ 12.91
2:08.49
▲ 8.55
2:00.35
▲ 8.14
1:54.88
▲ 5.47
1:54.22
▲ 0.66
500 Free SCY
—
—
7:35.00
6:53.22
▲ 41.78
—
—
5:48.74
▲ 64.48
5:27.08
▲ 21.66
5:19.91
▲ 7.17
5:08.33
▲ 11.58
1000 Free SCY
—
—
—
—
—
—
—
—
10:55.45
10:56.65
▼ 1.20
1650 Free SCY
—
—
—
—
—
—
—
—
17:58.43
18:02.97
▼ 4.54
50 Back SCY
51.22
43.47
▲ 7.75
37.15
▲ 6.32
35.10
▲ 2.05
33.54
▲ 1.56
32.41
▲ 1.13
—
27.24
▲ 5.17
26.26
▲ 0.98
25.96
▲ 0.30
100 Back SCY
—
1:33.27
1:22.72
▲ 10.55
1:15.68
▲ 7.04
1:10.73
▲ 4.95
1:06.73
▲ 4.00
1:02.06
▲ 4.67
57.66
▲ 4.40
55.92
▲ 1.74
54.69
▲ 1.23
200 Back SCY
—
—
2:54.14
—
—
2:27.12
▲ 27.02
2:10.10
▲ 17.02
2:06.87
▲ 3.23
2:00.61
▲ 6.26
1:59.00
▲ 1.61
50 Breast SCY
—
59.74
52.62
▲ 7.12
45.08
▲ 7.54
43.91
▲ 1.17
42.13
▲ 1.78
—
—
33.35
▲ 8.78
—
100 Breast SCY
—
—
—
—
1:34.92
1:28.22
▲ 6.70
1:23.08
▲ 5.14
1:18.22
▲ 4.86
1:13.23
▲ 4.99
1:11.49
▲ 1.74
200 Breast SCY
—
—
—
—
—
—
2:56.77
—
2:42.38
▲ 14.39
—
50 Fly SCY
—
41.34
36.20
▲ 5.14
35.40
▲ 0.80
34.43
▲ 0.97
32.02
▲ 2.41
—
27.71
▲ 4.31
—
—
100 Fly SCY
—
—
—
1:21.97
—
1:10.70
▲ 11.27
1:07.02
▲ 3.68
1:01.84
▲ 5.18
59.47
▲ 2.37
57.69
▲ 1.78
200 Fly SCY
—
—
—
—
—
—
2:31.92
2:24.65
▲ 7.27
—
2:12.21
▲ 12.44
100 IM SCY
—
1:31.71
1:26.83
▲ 4.88
1:24.30
▲ 2.53
1:17.00
▲ 7.30
1:14.15
▲ 2.85
—
—
1:00.71
▲ 13.44
59.48
▲ 1.23
200 IM SCY
—
—
—
2:57.38
2:45.70
▲ 11.68
2:35.92
▲ 9.78
2:27.14
▲ 8.78
2:20.02
▲ 7.12
2:16.40
▲ 3.62
2:09.47
▲ 6.93
400 IM SCY
—
—
—
—
—
—
5:11.33
4:58.00
▲ 13.33
—
4:37.94
▲ 20.06
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.