World Cup players whose last name begins with letter O
| Name | Pos | Birthdate | Birth City | Country | GP | G | A | P | PIM |
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 | O'Connell, Mike | D | 11/25/1955 | Chicago, Illinois | United States | 4 | 1 | 3 | 4 | 2 |
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| O'Flaherty, Gerry | F | 08/31/1950 | Pittsburgh, Pennsylvania | United States | 4 | 0 | 1 | 1 | 0 |
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 | O'Reilly, Ryan | F | 02/07/1991 | Clinton, Ontario | Canada | 6 | 0 | 0 | 0 | 0 |
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 | Obresa, Peter | F | 08/06/1960 | Marl | Germany | 5 | 1 | 0 | 1 | 2 |
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 | Obsut, Jaroslav | D | 03/09/1976 | Prešov | Slovakia | 3 | 0 | 0 | 0 | 0 |
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| Odelein, Lyle | D | 07/21/1968 | Quill Lake, Saskatchewan | Canada | 2 | 0 | 0 | 0 | 0 |
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 | Öhlund, Mattias | D | 09/09/1976 | Piteå | Sweden | 4 | 1 | 0 | 1 | 0 |
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 | Ojanen, Janne | F | 04/09/1968 | Tampere | Finland | 15 | 3 | 4 | 7 | 2 |
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| Oksanen, Lasse | F | 12/07/1942 | Tampere | Finland | 5 | 3 | 0 | 3 | 0 |
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| Olczyk, Ed | F | 08/16/1966 | Chicago, Illinois | United States | 19 | 2 | 10 | 12 | 12 |
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 | Orlov, Dmitry | D | 07/23/1991 | Novokuznetsk | Russia | 4 | 0 | 0 | 0 | 4 |
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| Orr, Bobby | D | 03/20/1948 | Parry Sound, Ontario | Canada | 7 | 2 | 7 | 9 | 8 |
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| Orszagh, Vladimir | F | 05/24/1977 | Banska Bystrica | Slovakia | 4 | 0 | 0 | 0 | 6 |
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| Oshie, T.J. | F | 12/23/1986 | Mt. Vernon, Washington | United States | 3 | 1 | 0 | 1 | 0 |
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| Östling, Stig | D | 12/31/1948 | Ockelbo | Sweden | 1 | 0 | 0 | 0 | 0 |
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| Otto, Joel | F | 10/29/1961 | Elk River, Minnesota | United States | 20 | 5 | 4 | 9 | 20 |
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| Ovechkin, Alexander | F | 09/17/1985 | Moscow | Russia | 6 | 2 | 2 | 4 | 6 |
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