KoKa · CZE
Jakub is a swimmer from Czechia, a butterfly specialist, whose official competitive record spans 3 seasons and 7 meets.
His recorded career begins in 2024, and one of his earliest marks still on file is the 800 butterfly in 12:15.73, raced in Karviná. He started out alongside Kosatky Karviná-oddíl plavání, z.s..
His signature event is the 100 butterfly, the event he has raced the most, followed by the 200 butterfly and 50 butterfly. Butterfly is the backbone of the whole record: 7 meets and 12 recorded swims.
His fastest 100 butterfly stands at 1:07.00, set in short course (25 m) at Nový Jičín.
The record runs unbroken from 2024 to 2026: 3 consecutive seasons without a single missing year. 2026 is the busiest season on record, with 12 verified individual swims.
Those meets span 5 different venues (Karviná, Cieszyn, Bruntál and Havířov…). He has raced for KoKa.
Still active: the directory includes official activity in the 2026 season. The last race on record is dated May 23, 2026 in Karviná, with 2 swims: 30.64 in the 50 butterfly and 1:16.81 in the 100 butterfly, all in short course (25 m) and 1 PB improvement. He holds 7 current event personal bests and 12 all-time PB improvements across 14 verified official swims.