Swimmer profile
Ryonosuke Jefferson
Male13-14DART SwimmingSN · WESTERN
SeasonUSA Swimming season runs Sept – Aug
Event
2023–24
2024–25
2025–26
50 Free SCY
29.52
25.73
▲ 3.79
24.14
▲ 1.59
100 Free SCY
1:04.23
54.73
▲ 9.50
51.48
▲ 3.25
200 Free SCY
2:18.97
1:58.86
▲ 20.11
1:52.47
▲ 6.39
500 Free SCY
—
5:23.78
4:59.04
▲ 24.74
1000 Free SCY
—
11:55.75
10:26.48
▲ 89.27
1650 Free SCY
—
—
17:15.51
50 Back SCY
—
35.31
31.72
▲ 3.59
100 Back SCY
—
1:11.94
—
200 Back SCY
—
2:29.05
2:20.94
▲ 8.11
50 Breast SCY
40.67
34.11
▲ 6.56
32.89
▲ 1.22
100 Breast SCY
1:33.27
1:17.84
▲ 15.43
1:13.84
▲ 4.00
200 Breast SCY
3:11.93
2:39.00
▲ 32.93
2:29.79
▲ 9.21
50 Fly SCY
33.46
29.47
▲ 3.99
26.72
▲ 2.75
100 Fly SCY
—
1:03.35
58.53
▲ 4.82
200 Fly SCY
—
2:30.91
2:26.26
▲ 4.65
100 IM SCY
1:18.54
1:03.42
▲ 15.12
1:02.66
▲ 0.76
200 IM SCY
—
2:19.11
2:10.90
▲ 8.21
400 IM SCY
—
5:01.38
4:52.73
▲ 8.65
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.