Swimmer profile

Mackenzie O'Brien

Female11-12Tollefson SwimmingPV · EASTERN

PerformanceProgressionGoalsTime StandardsMeets
Meets shown for
Short-Course YardsLong-Course Meters
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Meet50 Free LCM100 Free LCM50 Breast LCM100 Breast LCM50 Fly LCM200 IM LCM
2026 PV MCSL Coaches Long Course InvitationalJul 7, 2026——
41.23PB
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2026 PV The 47th Annual Maryland State LC Swim ChampionshipsMay 31, 2026
35.20+0.37
1:21.76PB
42.67+1.44
1:34.95PB
41.15PB
3:14.76PB
2026 PV PAC Dive into Spring LCApr 25, 2026
34.83PB
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