Swimmer profile
Mark Sferra
Male17-18Lakeshore Swim ClubOH · CENTRALCollege athlete · Oberlin CollegeD3
SeasonUSA Swimming season runs Sept – Aug
Event
2020–21
2021–22
2022–23
2023–24
2024–25
50 Free LCM
34.02
—
28.52
▲ 5.50
27.71
▲ 0.81
27.32
▲ 0.39
100 Free LCM
1:21.08
1:07.43
▲ 13.65
1:04.12
▲ 3.31
1:02.74
▲ 1.38
1:00.49
▲ 2.25
200 Free LCM
—
2:33.64
2:19.82
▲ 13.82
2:15.77
▲ 4.05
2:14.69
▲ 1.08
400 Free LCM
—
—
4:53.72
4:46.33
▲ 7.39
4:50.78
▼ 4.45
800 Free LCM
—
—
—
9:55.10
10:04.31
▼ 9.21
50 Back LCM
—
—
—
35.68
—
100 Back LCM
—
1:23.49
—
1:17.73
▲ 5.76
1:10.74
▲ 6.99
200 Back LCM
—
—
2:44.57
—
2:39.69
▲ 4.88
50 Fly LCM
—
—
—
30.96
29.03
▲ 1.93
100 Fly LCM
1:52.70
—
—
1:20.52
▲ 32.18
—
200 IM LCM
3:31.11
—
—
—
2:45.80
▲ 45.31
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.