Swimmer profile
Knox O'Brien
Male13-14757 SwimVA · EASTERN
SeasonUSA Swimming season runs Sept – Aug
Event
2021–22
2022–23
2023–24
2024–25
2025–26
50 Free LCM
35.52
31.69
▲ 3.83
29.83
▲ 1.86
27.91
▲ 1.92
26.16
▲ 1.75
100 Free LCM
1:19.35
1:10.30
▲ 9.05
1:05.84
▲ 4.46
1:02.02
▲ 3.82
57.23
▲ 4.79
200 Free LCM
2:59.97
2:45.78
▲ 14.19
2:30.26
▲ 15.52
2:26.53
▲ 3.73
2:22.56
▲ 3.97
400 Free LCM
—
5:54.21
—
—
—
50 Back LCM
40.11
37.35
▲ 2.76
34.25
▲ 3.10
33.18
▲ 1.07
30.55
▲ 2.63
100 Back LCM
1:30.50
1:22.21
▲ 8.29
1:15.65
▲ 6.56
1:13.13
▲ 2.52
1:08.76
▲ 4.37
50 Breast LCM
51.38
—
42.59
▲ 8.79
37.44
▲ 5.15
—
50 Fly LCM
38.07
34.97
▲ 3.10
30.94
▲ 4.03
30.17
▲ 0.77
27.66
▲ 2.51
100 Fly LCM
1:37.02
1:27.67
▲ 9.35
1:16.02
▲ 11.65
1:09.59
▲ 6.43
1:01.79
▲ 7.80
200 IM LCM
3:22.60
3:01.53
▲ 21.07
2:49.14
▲ 12.39
2:42.89
▲ 6.25
2:42.87
▲ 0.02
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.