Swimmer profile
John Knapschaefer
Male17-18Mason Manta RaysOH · CENTRAL
SeasonUSA Swimming season runs Sept – Aug
Event
2016–17
2017–18
2018–19
2020–21
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free LCM
43.86
35.71
▲ 8.15
31.33
▲ 4.38
29.62
▲ 1.71
27.64
▲ 1.98
26.16
▲ 1.48
26.29
▼ 0.13
26.24
▲ 0.05
26.00
▲ 0.24
100 Free LCM
1:39.57
1:19.93
▲ 19.64
1:11.22
▲ 8.71
1:09.18
▲ 2.04
1:01.01
▲ 8.17
57.83
▲ 3.18
57.06
▲ 0.77
56.61
▲ 0.45
57.66
▼ 1.05
200 Free LCM
3:45.98
3:02.66
▲ 43.32
2:37.44
▲ 25.22
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2:16.15
▲ 21.29
2:11.01
▲ 5.14
2:04.30
▲ 6.71
2:00.08
▲ 4.22
2:05.07
▼ 4.99
400 Free LCM
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5:42.07
4:52.58
▲ 49.49
4:38.07
▲ 14.51
4:22.21
▲ 15.86
4:17.21
▲ 5.00
4:24.04
▼ 6.83
800 Free LCM
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—
—
—
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9:12.09
9:31.60
▼ 19.51
9:27.45
▲ 4.15
1500 Free LCM
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—
—
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18:25.22
17:28.54
▲ 56.68
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50 Back LCM
49.71
44.51
▲ 5.20
42.61
▲ 1.90
39.08
▲ 3.53
35.46
▲ 3.62
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36.22
▼ 0.76
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100 Back LCM
1:54.38
1:36.22
▲ 18.16
1:26.92
▲ 9.30
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1:16.57
▲ 10.35
1:15.92
▲ 0.65
1:14.58
▲ 1.34
1:14.42
▲ 0.16
1:10.64
▲ 3.78
200 Back LCM
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—
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2:43.98
2:41.76
▲ 2.22
2:37.20
▲ 4.56
2:40.40
▼ 3.20
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50 Breast LCM
1:05.12
55.30
▲ 9.82
47.06
▲ 8.24
41.14
▲ 5.92
37.20
▲ 3.94
38.08
▼ 0.88
35.60
▲ 2.48
33.30
▲ 2.30
33.77
▼ 0.47
100 Breast LCM
2:23.63
1:54.95
▲ 28.68
1:40.98
▲ 13.97
1:35.09
▲ 5.89
1:21.46
▲ 13.63
1:19.31
▲ 2.15
1:18.30
▲ 1.01
1:14.44
▲ 3.86
1:14.07
▲ 0.37
200 Breast LCM
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3:16.53
2:56.29
▲ 20.24
2:54.09
▲ 2.20
2:42.94
▲ 11.15
2:50.73
▼ 7.79
2:42.41
▲ 8.32
50 Fly LCM
1:07.28
46.42
▲ 20.86
37.04
▲ 9.38
35.17
▲ 1.87
32.79
▲ 2.38
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28.10
▲ 4.69
100 Fly LCM
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2:03.31
1:35.80
▲ 27.51
1:22.20
▲ 13.60
1:14.73
▲ 7.47
1:09.31
▲ 5.42
1:05.37
▲ 3.94
1:07.09
▼ 1.72
1:04.72
▲ 2.37
200 Fly LCM
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2:40.77
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2:48.01
▼ 7.24
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200 IM LCM
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3:26.58
2:59.81
▲ 26.77
2:48.62
▲ 11.19
2:34.20
▲ 14.42
2:36.20
▼ 2.00
2:27.49
▲ 8.71
2:25.93
▲ 1.56
2:27.12
▼ 1.19
400 IM LCM
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5:55.52
5:25.57
▲ 29.95
5:12.58
▲ 12.99
5:15.86
▼ 3.28
5:27.14
▼ 11.28
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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.