Swimmer profile
Ryonosuke Jefferson
Male13-14DART SwimmingSN · WESTERN
SeasonUSA Swimming season runs Sept – Aug
Event
2023–24
2024–25
2025–26
50 Free LCM
31.76
28.14
▲ 3.62
27.70
▲ 0.44
100 Free LCM
1:10.22
1:00.69
▲ 9.53
59.17
▲ 1.52
200 Free LCM
—
2:11.68
2:09.78
▲ 1.90
400 Free LCM
5:21.38
4:41.56
▲ 39.82
4:40.62
▲ 0.94
800 Free LCM
—
—
9:23.13
1500 Free LCM
23:14.44
20:16.84
▲ 177.60
18:18.71
▲ 118.13
50 Back LCM
41.12
37.50
▲ 3.62
—
100 Back LCM
—
1:20.32
1:14.69
▲ 5.63
50 Breast LCM
44.45
—
36.89
▲ 7.56
100 Breast LCM
1:33.46
1:23.99
▲ 9.47
—
200 Breast LCM
—
3:02.96
—
50 Fly LCM
36.49
31.55
▲ 4.94
30.59
▲ 0.96
100 Fly LCM
—
1:07.81
1:07.62
▲ 0.19
200 Fly LCM
—
2:55.09
—
200 IM LCM
—
2:32.82
2:29.79
▲ 3.03
400 IM LCM
—
5:28.96
5:26.95
▲ 2.01
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.