Swimmer profile
John Knapschaefer
Male17-18Mason Manta RaysOH · CENTRAL
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
55.30
41.29
▲ 14.01
32.06
▲ 9.23
30.08
▲ 1.98
28.01
▲ 2.07
27.08
▲ 0.93
24.59
▲ 2.49
23.30
▲ 1.29
23.12
▲ 0.18
22.85
▲ 0.27
22.16
▲ 0.69
100 Free SCY
—
1:36.70
1:15.83
▲ 20.87
1:07.30
▲ 8.53
1:04.26
▲ 3.04
1:02.07
▲ 2.19
53.59
▲ 8.48
51.36
▲ 2.23
49.77
▲ 1.59
49.48
▲ 0.29
48.23
▲ 1.25
200 Free SCY
—
—
2:47.53
2:30.10
▲ 17.43
2:21.51
▲ 8.59
2:21.32
▲ 0.19
1:57.31
▲ 24.01
1:53.40
▲ 3.91
1:46.53
▲ 6.87
1:44.94
▲ 1.59
1:43.79
▲ 1.15
500 Free SCY
—
—
—
6:59.28
6:21.76
▲ 37.52
6:07.00
▲ 14.76
5:34.22
▲ 32.78
5:08.34
▲ 25.88
4:48.68
▲ 19.66
4:47.80
▲ 0.88
4:42.85
▲ 4.95
1000 Free SCY
—
—
—
—
—
—
—
—
10:46.49
—
—
1650 Free SCY
—
—
—
—
—
—
—
18:48.76
—
17:32.81
▲ 75.95
—
50 Back SCY
55.40
46.54
▲ 8.86
38.79
▲ 7.75
36.26
▲ 2.53
35.59
▲ 0.67
34.89
▲ 0.70
33.42
▲ 1.47
30.24
▲ 3.18
30.26
▼ 0.02
29.67
▲ 0.59
—
100 Back SCY
—
1:47.13
1:26.61
▲ 20.52
1:17.42
▲ 9.19
1:20.84
▼ 3.42
1:13.25
▲ 7.59
1:10.93
▲ 2.32
1:03.80
▲ 7.13
1:01.42
▲ 2.38
—
1:00.43
▲ 0.99
200 Back SCY
—
—
—
—
2:51.84
2:42.31
▲ 9.53
2:29.53
▲ 12.78
2:11.77
▲ 17.76
2:19.75
▼ 7.98
2:21.74
▼ 1.99
2:12.83
▲ 8.91
50 Breast SCY
1:15.52
1:01.81
▲ 13.71
51.39
▲ 10.42
42.19
▲ 9.20
36.56
▲ 5.63
36.05
▲ 0.51
35.40
▲ 0.65
33.14
▲ 2.26
32.04
▲ 1.10
30.76
▲ 1.28
30.29
▲ 0.47
100 Breast SCY
—
2:08.88
1:43.05
▲ 25.83
1:32.51
▲ 10.54
1:23.18
▲ 9.33
1:26.47
▼ 3.29
1:08.48
▲ 17.99
1:06.01
▲ 2.47
1:03.59
▲ 2.42
1:02.20
▲ 1.39
1:01.16
▲ 1.04
200 Breast SCY
—
—
—
—
3:00.09
2:49.55
▲ 10.54
2:31.22
▲ 18.33
2:22.51
▲ 8.71
2:17.31
▲ 5.20
2:16.66
▲ 0.65
2:14.67
▲ 1.99
50 Fly SCY
—
56.75
43.16
▲ 13.59
34.51
▲ 8.65
31.26
▲ 3.25
33.17
▼ 1.91
30.65
▲ 2.52
27.36
▲ 3.29
27.17
▲ 0.19
26.29
▲ 0.88
25.01
▲ 1.28
100 Fly SCY
—
—
1:51.87
1:18.69
▲ 33.18
1:17.27
▲ 1.42
1:12.99
▲ 4.28
1:06.38
▲ 6.61
58.41
▲ 7.97
1:00.54
▼ 2.13
1:00.39
▲ 0.15
58.32
▲ 2.07
200 Fly SCY
—
—
—
—
2:46.22
2:45.05
▲ 1.17
2:34.07
▲ 10.98
2:15.16
▲ 18.91
2:19.64
▼ 4.48
2:12.57
▲ 7.07
2:15.53
▼ 2.96
100 IM SCY
—
1:48.93
1:34.45
▲ 14.48
1:19.08
▲ 15.37
1:14.21
▲ 4.87
1:10.36
▲ 3.85
1:08.07
▲ 2.29
1:04.02
▲ 4.05
1:02.81
▲ 1.21
1:01.28
▲ 1.53
—
200 IM SCY
—
—
3:09.18
2:48.55
▲ 20.63
2:36.08
▲ 12.47
2:24.86
▲ 11.22
2:13.95
▲ 10.91
2:08.95
▲ 5.00
2:12.53
▼ 3.58
2:03.99
▲ 8.54
1:58.42
▲ 5.57
400 IM SCY
—
—
—
—
5:32.02
5:04.94
▲ 27.08
4:46.95
▲ 17.99
4:26.34
▲ 20.61
4:36.50
▼ 10.16
—
4:35.14
▲ 1.36
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.