| Athletes |
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Biographical data for: Rinze ONDERWATER
| Classifications in season 2026/2027: |
| 12/09/26 | Heerenveen NED | National League NED - Opening competition | Divisie E | | 1000 meter: 19th | | 09/10/26 | Rostock GER | Hanse Cup International 31st - Golden Sun Award 1 | Men S-U15 PG2 | | Overall Ranking: 9th, 500 meter: 9th, 1000 meter: 11th, 1500 meter: 6th | | 09/10/26 | Rostock GER | Hanse Cup International 31st - Golden Sun Award 1 | Men S-U15 | | Overall Ranking: 21st, 500 meter: 21st | | 24/10/26 | Den Haag NED | Lara van Ruijven memorial - Golden Sun Award 2 | Men U17 (B) | | Overall Ranking: 5th, 500 meter: 9th, 500 meter: 16th, 1000 meter: 9th, 1000 meter: 3rd | | 24/10/26 | Den Haag NED | Lara van Ruijven memorial - Golden Sun Award 2 | Men BAS | | Overall Ranking: 5th, 500 meter: 9th, 500 meter: 16th, 1000 meter: 9th, 1000 meter: 3rd | | 08/11/26 | Utrecht NED | National League NED - KNSB Cup breed-1 | Divisie C | | Overall Ranking: 8th, 1000 meter: 8th |
| Results in season 2026/2027: |
| 500 meter |
| 47 | .426 | 10/10/26 | Rostock GER | Hanse Cup International 31st - Golden Sun Award 1 | Quarter Finals, Group 1 | |
| 47 | .577 | 09/10/26 | Rostock GER | Hanse Cup International 31st - Golden Sun Award 1 | Race 1, Group 1 | |
| 47 | .867 | 25/10/26 | Den Haag NED | Lara van Ruijven memorial - Golden Sun Award 2 | Quarter Finals, Group 1 | |
| 49 | .072 | 25/10/26 | Den Haag NED | Lara van Ruijven memorial - Golden Sun Award 2 | Final, Group 4 | |
| 1:13 | .039 | 09/10/26 | Rostock GER | Hanse Cup International 31st - Golden Sun Award 1 | Race 2, Group 1 | |
| 1:13 | .384 | 10/10/26 | Rostock GER | Hanse Cup International 31st - Golden Sun Award 1 | Semi Final, Group 1 | |
| P | 25/10/26 | Den Haag NED | Lara van Ruijven memorial - Golden Sun Award 2 | Semi Final, Group 2 | |
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| 1000 meter |
| 1:39 | .200 | 08/11/26 | Utrecht NED | National League NED - KNSB Cup breed-1 | Finale, Groep 2 | |
| 1:39 | .798 | 11/10/26 | Rostock GER | Hanse Cup International 31st - Golden Sun Award 1 | Final, Group 3 | |
| 1:40 | .060 | 08/11/26 | Utrecht NED | National League NED - KNSB Cup breed-1 | Halve Finales, Groep 1 | |
| 1:40 | .972 | 12/09/26 | Heerenveen NED | National League NED - Opening competition | Final, Group 4 | |
| 1:41 | .197 | 12/09/26 | Heerenveen NED | National League NED - Opening competition | Semi Final, Group 2 | |
| 1:42 | .202 | 08/11/26 | Utrecht NED | National League NED - KNSB Cup breed-1 | Kwart Finales, Groep 1 | |
| 1:43 | .800 | 24/10/26 | Den Haag NED | Lara van Ruijven memorial - Golden Sun Award 2 | Final, Group 2 | |
| 1:45 | .212 | 12/09/26 | Heerenveen NED | National League NED - Opening competition | Quarter Finals, Group 1 | |
| 1:46 | .003 | 24/10/26 | Den Haag NED | Lara van Ruijven memorial - Golden Sun Award 2 | Quarter Finals, Group 1 | |
| 1:46 | .056 | 10/10/26 | Rostock GER | Hanse Cup International 31st - Golden Sun Award 1 | Quarter Finals, Group 1 | |
| P | 11/10/26 | Rostock GER | Hanse Cup International 31st - Golden Sun Award 1 | Semi Final, Group 1 | |
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| 1500 meter |
| 2:53 | .655 | 09/10/26 | Rostock GER | Hanse Cup International 31st - Golden Sun Award 1 | Semi Final, Group 1 | |
| P | 09/10/26 | Rostock GER | Hanse Cup International 31st - Golden Sun Award 1 | Final, Final | |
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| 3000 meter relay |
| 4:35 | .266 | 12/09/26 | Heerenveen NED | National League NED - Opening competition | Final, Group 1 | |
| (S3TeamF: Steven Grippeling, Rinze Onderwater, Ief Straathof, Lobke van Benthum) |
| 4:40 | .126 | 08/11/26 | Utrecht NED | National League NED - KNSB Cup breed-1 | Finale, Groep 1 | |
| (Team 10: Sanne Brinksma, Rinze Onderwater, Marjolein Ooms, Jelte van Haskera) |
| 4:49 | .201 | 24/10/26 | Den Haag NED | Lara van Ruijven memorial - Golden Sun Award 2 | Final, Group 1 | |
| (IHC Leiden 1: Mijntje Juffermans, Anna Meulmeester, Rinze Onderwater, Niels Pennings) |
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