Swimmer profile
Mason Klaassen
Male13-14Wichita Swim ClubMV · CENTRAL
SeasonUSA Swimming season runs Sept – Aug
Event
2023–24
2024–25
2025–26
50 Free LCM
32.59
27.82
▲ 4.77
26.26
▲ 1.56
100 Free LCM
1:16.70
1:03.91
▲ 12.79
59.69
▲ 4.22
200 Free LCM
3:24.88
2:33.67
▲ 51.21
2:25.05
▲ 8.62
400 Free LCM
—
5:57.36
5:32.35
▲ 25.01
800 Free LCM
—
—
11:29.38
50 Back LCM
44.76
36.82
▲ 7.94
—
100 Back LCM
1:40.01
1:22.54
▲ 17.47
1:10.85
▲ 11.69
200 Back LCM
—
3:24.41
—
50 Breast LCM
45.22
37.87
▲ 7.35
34.81
▲ 3.06
100 Breast LCM
1:40.49
1:24.34
▲ 16.15
1:24.23
▲ 0.11
200 Breast LCM
3:38.71
3:09.72
▲ 28.99
—
50 Fly LCM
42.14
31.25
▲ 10.89
30.47
▲ 0.78
100 Fly LCM
—
1:10.56
1:12.62
▼ 2.06
200 IM LCM
—
2:45.25
2:42.08
▲ 3.17
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.