Swimmer profile
Makenzie O'Brien
FemaleOpen / SeniorAnnapolis Swim ClubMD · EASTERN
SeasonUSA Swimming season runs Sept – Aug
Event
2014–15
2015–16
2016–17
2017–18
2018–19
2020–21
2021–22
2022–23
2023–24
2024–25
50 Free LCM
50.54
45.93
▲ 4.61
38.88
▲ 7.05
34.13
▲ 4.75
32.39
▲ 1.74
31.88
▲ 0.51
31.26
▲ 0.62
31.37
▼ 0.11
31.18
▲ 0.19
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100 Free LCM
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1:23.96
1:17.43
▲ 6.53
1:11.13
▲ 6.30
1:06.89
▲ 4.24
1:06.57
▲ 0.32
1:07.59
▼ 1.02
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1:07.72
▼ 0.13
200 Free LCM
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—
3:03.02
2:42.13
▲ 20.89
2:32.26
▲ 9.87
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2:23.65
▲ 8.61
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2:21.81
▲ 1.84
2:27.74
▼ 5.93
400 Free LCM
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—
—
5:47.55
5:23.17
▲ 24.38
4:55.20
▲ 27.97
4:54.94
▲ 0.26
4:52.50
▲ 2.44
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5:02.56
▼ 10.06
800 Free LCM
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—
—
—
11:05.39
—
—
9:59.18
▲ 66.21
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50 Back LCM
58.86
50.23
▲ 8.63
43.33
▲ 6.90
39.15
▲ 4.18
37.21
▲ 1.94
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34.70
▲ 2.51
35.54
▼ 0.84
34.71
▲ 0.83
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100 Back LCM
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—
1:34.07
1:25.11
▲ 8.96
1:19.90
▲ 5.21
1:15.32
▲ 4.58
1:17.65
▼ 2.33
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1:15.00
▲ 2.65
1:15.70
▼ 0.70
200 Back LCM
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—
—
2:49.59
2:47.41
▲ 2.18
2:39.15
▲ 8.26
2:41.41
▼ 2.26
2:40.96
▲ 0.45
2:34.91
▲ 6.05
2:41.18
▼ 6.27
50 Breast LCM
1:09.36
58.11
▲ 11.25
49.16
▲ 8.95
41.66
▲ 7.50
39.63
▲ 2.03
38.62
▲ 1.01
38.82
▼ 0.20
38.49
▲ 0.33
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38.50
▼ 0.01
100 Breast LCM
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2:05.57
1:38.99
▲ 26.58
1:32.78
▲ 6.21
1:25.60
▲ 7.18
1:23.99
▲ 1.61
1:23.83
▲ 0.16
1:22.02
▲ 1.81
1:25.45
▼ 3.43
1:23.48
▲ 1.97
200 Breast LCM
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3:48.98
3:14.60
▲ 34.38
3:01.19
▲ 13.41
2:56.07
▲ 5.12
3:04.59
▼ 8.52
2:52.98
▲ 11.61
2:59.25
▼ 6.27
2:54.29
▲ 4.96
50 Fly LCM
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46.72
42.09
▲ 4.63
38.02
▲ 4.07
35.34
▲ 2.68
—
33.82
▲ 1.52
—
33.48
▲ 0.34
33.45
▲ 0.03
100 Fly LCM
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—
1:44.96
1:34.08
▲ 10.88
1:19.04
▲ 15.04
1:15.81
▲ 3.23
1:17.40
▼ 1.59
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1:16.29
▲ 1.11
1:17.00
▼ 0.71
200 Fly LCM
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—
—
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3:07.99
—
2:59.57
▲ 8.42
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200 IM LCM
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3:50.03
3:14.24
▲ 35.79
2:57.79
▲ 16.45
2:48.95
▲ 8.84
2:38.17
▲ 10.78
2:37.62
▲ 0.55
2:36.27
▲ 1.35
2:40.13
▼ 3.86
2:39.09
▲ 1.04
400 IM LCM
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—
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6:10.81
5:51.15
▲ 19.66
5:30.60
▲ 20.55
5:34.35
▼ 3.75
5:31.42
▲ 2.93
5:37.83
▼ 6.41
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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.