Swimmer profile
Mason Klaassen
Male13-14Wichita Swim ClubMV · CENTRAL
SeasonUSA Swimming season runs Sept – Aug
Event
2023–24
2024–25
2025–26
50 Free SCY
31.01
25.14
▲ 5.87
23.74
▲ 1.40
100 Free SCY
1:10.36
57.09
▲ 13.27
52.71
▲ 4.38
200 Free SCY
3:03.20
2:41.40
▲ 21.80
2:00.46
▲ 40.94
500 Free SCY
—
7:04.03
6:02.95
▲ 61.08
50 Back SCY
38.93
37.99
▲ 0.94
32.04
▲ 5.95
100 Back SCY
—
1:23.77
1:05.62
▲ 18.15
200 Back SCY
—
—
2:26.77
50 Breast SCY
39.01
36.98
▲ 2.03
30.61
▲ 6.37
100 Breast SCY
1:28.66
1:14.79
▲ 13.87
1:12.43
▲ 2.36
200 Breast SCY
3:19.58
2:45.78
▲ 33.80
2:37.62
▲ 8.16
50 Fly SCY
37.50
—
27.02
▲ 10.48
100 Fly SCY
—
1:16.68
1:00.34
▲ 16.34
200 Fly SCY
—
—
2:33.90
100 IM SCY
1:28.47
1:16.78
▲ 11.69
—
200 IM SCY
—
2:55.43
2:17.04
▲ 38.39
400 IM SCY
—
—
5:22.70
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.