Swimmer profile
Cj Koslin
Female15-16Excel AquaticsSE · SOUTHERN
SeasonUSA Swimming season runs Sept – Aug
Event
2020–21
2021–22
2023–24
2024–25
2025–26
50 Free LCM
52.33
48.07
▲ 4.26
36.40
▲ 11.67
30.04
▲ 6.36
29.67
▲ 0.37
100 Free LCM
2:00.25
1:48.59
▲ 11.66
1:19.28
▲ 29.31
1:06.49
▲ 12.79
1:05.11
▲ 1.38
200 Free LCM
—
—
—
—
2:25.22
400 Free LCM
—
—
—
—
5:10.58
800 Free LCM
—
—
—
—
10:56.03
1500 Free LCM
—
—
—
—
21:33.05
50 Back LCM
54.60
49.76
▲ 4.84
—
38.00
▲ 11.76
—
100 Back LCM
1:57.87
1:59.34
▼ 1.47
1:32.82
▲ 26.52
1:22.18
▲ 10.64
—
50 Breast LCM
57.08
53.49
▲ 3.59
—
40.15
▲ 13.34
39.25
▲ 0.90
100 Breast LCM
2:03.25
1:58.80
▲ 4.45
1:32.91
▲ 25.89
1:28.40
▲ 4.51
1:25.98
▲ 2.42
200 Breast LCM
—
—
3:20.15
3:13.10
▲ 7.05
—
200 IM LCM
—
—
3:24.29
—
—
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.