| Position: | Defence |
| Shoots: | Right |
| Height Ft: | 6 |
| Height In: | 5 |
| Weight Lb: | 228 |
| Birth Date: | September 15, 1978 |
| Birth Place: | Jihlava, Czechoslovakia |
| Career Start: | 1995 |
| Career End: | 2014 |
| Draft: | 36th overall |
| Draft Year: | 1996 |
| Draft Team: | Toronto Maple Leafs |
| Played For: | Tampa Bay Lightning HC České Budějovice |
Marek Posmyk (born September 15, 1978) is a Czech former professional ice hockey defenceman who last played for HC České Budějovice of the Czech Extraliga. He was drafted in the second round, 36th overall, of the 1996 NHL Entry Draft by the Toronto Maple Leafs. He was traded by the Maple Leafs to the Tampa Bay Lightning on February 9, 2000, as part of the deal which brought Darcy Tucker to Toronto.
Posmyk played nineteen games in the National Hockey League with the Lightning: eighteen in the 1999–2000 season and one more in the 2000–01 season. He scored one goal and two assists for Tampa Bay.
| Team | League | GP | GP | G | A | Pts | PIM | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1995–96 | HC Dukla Jihlava | CZE | 19 | 1 | 3 | 4 | 18 | 2 | 0 | 0 | 0 | 0 | ||
| 1996–97 | HC Dukla Jihlava | CZE | 24 | 1 | 7 | 8 | 6 | — | — | — | — | — | ||
| 1996–97 | St. John's Maple Leafs | AHL | 2 | 0 | 0 | 0 | 2 | — | — | — | — | — | ||
| 1997–98 | Sarnia Sting | OHL | 48 | 8 | 16 | 24 | 94 | 5 | 0 | 2 | 2 | 6 | ||
| 1997–98 | St. John's Maple Leafs | AHL | 3 | 0 | 0 | 0 | 4 | — | — | — | — | — | ||
| 1998–99 | St. John's Maple Leafs | AHL | 41 | 1 | 0 | 1 | 36 | — | — | — | — | — | ||
| 1999–00 | St. John's Maple Leafs | AHL | 38 | 1 | 6 | 7 | 57 | — | — | — | — | — | ||
| 1999–00 | IHL | 1 | 0 | 1 | 1 | 0 | — | — | — | — | — | |||
| 1999–00 | NHL | 18 | 1 | 2 | 3 | 20 | — | — | — | — | — | |||
| 2000–01 | Detroit Vipers | IHL | 49 | 7 | 14 | 21 | 58 | — | — | — | — | — | ||
| 2000–01 | Tampa Bay Lightning | NHL | 1 | 0 | 0 | 0 | 0 | — | — | — | — | — | ||
| 2001–02 | Aukro Berani Zlín | CZE | 45 | 8 | 6 | 14 | 147 | 6 | 0 | 0 | 0 | 10 | ||
| 2002–03 | HC Slavia Praha | CZE | 41 | 0 | 4 | 4 | 20 | 17 | 4 | 3 | 7 | 34 | ||
| 2003–04 | HC Plzeň | CZE | 10 | 0 | 1 | 1 | 14 | — | — | — | — | — | ||
| 2003–04 | Nuermberg Ice Tigers | DEL | 25 | 2 | 4 | 6 | 24 | 6 | 1 | 2 | 3 | 6 | ||
| 2004–05 | EHC Black Wings Linz | EBEL | 34 | 7 | 4 | 11 | 68 | — | — | — | — | — | ||
| 2005–06 | Motor České Budějovice | CZE | 42 | 11 | 12 | 23 | 72 | 10 | 2 | 3 | 5 | 10 | ||
| 2006–07 | Motor České Budějovice | CZE | 38 | 8 | 4 | 12 | 67 | 11 | 1 | 0 | 1 | 10 | ||
| 2007–08 | HC Dynamo Pardubice | CZE | 37 | 3 | 1 | 4 | 30 | — | — | — | — | — | ||
| 2007–08 | HC Plzeň | CZE | 5 | 1 | 0 | 1 | 4 | 4 | 0 | 0 | 0 | 18 | ||
| 2008–09 | BK Mladá Boleslav | CZE | 33 | 3 | 4 | 7 | 18 | — | — | — | — | — | ||
| 2008–09 | Motor České Budějovice | CZE | 2 | 0 | 0 | 0 | 4 | — | — | — | — | — | ||
| 2010–11 | Lausitzer Füchse | DEL2 | 4 | 0 | 1 | 1 | 20 | — | — | — | — | — | ||
| 2010–11 | SG Cortina | Italy-A | 25 | 5 | 18 | 23 | 34 | — | — | — | — | — | ||
| 2011–12 | HC Kladno | CZE | 16 | 4 | 1 | 5 | 34 | — | — | — | — | — | ||
| 2012–13 | HC Litvínov | CZE | 42 | 3 | 7 | 10 | 74 | 7 | 1 | 0 | 1 | 4 | ||
| 2013–14 | HC Litvínov | CZE | 34 | 2 | 4 | 6 | 78 | — | — | — | — | — | ||
| NHL totals | 19 | 1 | 2 | 3 | 20 | — | — | — | — | — | ||||