Swimmer profile
MJ Neilson
FemaleOpen / SeniorTucson Ford Dealers AquaticsAZ · WESTERNCollege athlete · University of ArizonaD1
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
31.02
28.18
▲ 2.84
26.49
▲ 1.69
26.22
▲ 0.27
25.13
▲ 1.09
25.10
▲ 0.03
24.92
▲ 0.18
24.23
▲ 0.69
23.43
▲ 0.80
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100 Free SCY
1:09.42
1:00.92
▲ 8.50
57.33
▲ 3.59
55.53
▲ 1.80
54.55
▲ 0.98
53.24
▲ 1.31
52.61
▲ 0.63
51.90
▲ 0.71
50.85
▲ 1.05
54.06
▼ 3.21
53.02
▲ 1.04
200 Free SCY
2:36.29
2:16.80
▲ 19.49
2:07.72
▲ 9.08
2:00.13
▲ 7.59
1:55.27
▲ 4.86
1:54.10
▲ 1.17
1:51.03
▲ 3.07
1:51.42
▼ 0.39
1:51.25
▲ 0.17
1:54.95
▼ 3.70
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500 Free SCY
7:54.68
6:21.60
▲ 93.08
5:45.01
▲ 36.59
5:27.45
▲ 17.56
5:09.59
▲ 17.86
5:06.75
▲ 2.84
5:03.55
▲ 3.20
5:06.69
▼ 3.14
5:04.20
▲ 2.49
5:00.60
▲ 3.60
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1000 Free SCY
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11:59.63
10:58.82
▲ 60.81
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10:32.23
▲ 26.59
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1650 Free SCY
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21:31.77
19:52.43
▲ 99.34
18:56.26
▲ 56.17
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17:31.54
▲ 84.72
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50 Back SCY
39.06
33.43
▲ 5.63
31.55
▲ 1.88
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100 Back SCY
1:27.15
1:14.42
▲ 12.73
1:07.05
▲ 7.37
1:05.94
▲ 1.11
1:02.12
▲ 3.82
1:03.34
▼ 1.22
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59.42
▲ 3.92
1:00.47
▼ 1.05
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200 Back SCY
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2:23.64
2:22.01
▲ 1.63
2:12.08
▲ 9.93
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2:11.39
▲ 0.69
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2:07.25
▲ 4.14
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50 Breast SCY
40.78
34.65
▲ 6.13
33.47
▲ 1.18
33.01
▲ 0.46
33.61
▼ 0.60
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100 Breast SCY
1:26.83
1:17.19
▲ 9.64
1:12.73
▲ 4.46
1:11.80
▲ 0.93
1:10.99
▲ 0.81
1:10.07
▲ 0.92
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1:06.97
▲ 3.10
1:09.40
▼ 2.43
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200 Breast SCY
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2:57.50
2:42.69
▲ 14.81
2:41.66
▲ 1.03
2:34.14
▲ 7.52
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2:28.40
▲ 5.74
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50 Fly SCY
34.65
30.94
▲ 3.71
29.41
▲ 1.53
27.26
▲ 2.15
27.87
▼ 0.61
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26.51
▲ 1.36
24.95
▲ 1.56
100 Fly SCY
1:21.58
1:09.41
▲ 12.17
1:03.04
▲ 6.37
59.06
▲ 3.98
57.33
▲ 1.73
56.23
▲ 1.10
55.09
▲ 1.14
55.50
▼ 0.41
54.61
▲ 0.89
54.23
▲ 0.38
54.39
▼ 0.16
200 Fly SCY
3:17.51
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2:37.72
▲ 39.79
2:10.25
▲ 27.47
2:06.14
▲ 4.11
2:03.47
▲ 2.67
2:01.64
▲ 1.83
2:01.24
▲ 0.40
2:01.28
▼ 0.04
2:00.59
▲ 0.69
1:59.52
▲ 1.07
100 IM SCY
1:19.03
1:08.43
▲ 10.60
1:04.41
▲ 4.02
1:02.13
▲ 2.28
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200 IM SCY
2:52.74
2:30.16
▲ 22.58
2:21.23
▲ 8.93
2:10.89
▲ 10.34
2:10.43
▲ 0.46
2:07.26
▲ 3.17
2:07.04
▲ 0.22
2:07.68
▼ 0.64
2:08.41
▼ 0.73
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2:08.63
▼ 0.22
400 IM SCY
6:33.24
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4:58.96
▲ 94.28
4:46.44
▲ 12.52
4:37.00
▲ 9.44
4:30.69
▲ 6.31
4:37.27
▼ 6.58
4:32.91
▲ 4.36
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4:37.11
▼ 4.20
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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.