After being drafted by the Detroit Red Wings in the 2000 NHL Entry Draft, Kopecký played two seasons of junior hockey with the Lethbridge Hurricanes of the Western Hockey League (WHL).
He turned professional with the American Hockey League (AHL), initially with the Cincinnati Mighty Ducks before being assigned to the Grand Rapids Griffins.

Kopecký played four seasons with the Griffins before making his NHL debut with the Red Wings in 2005–06, appearing in one game.
The following season, on December 14, 2006, in a game against the Chicago Blackhawks, Kopecký was injured a minute into the third period of the Red Wings' 3–2 victory.
Kopecký lost his footing and hit the boards as he approached the Chicago blue line and Blackhawks defenseman Jim Vandermeer then fell on top of him.
Kopecký was motionless on the ice for a few minutes before being helped to the dressing room by members of the Detroit training staff.
He had surgery the next day to repair a broken clavicle.
As a result of this injury, he was limited to just 26 games in 2006–07 season.
Kopecký had previously worn the number 28 with Detroit, but switched to 82 after the Red Wings acquired free agent defenseman Brian Rafalski.

On April 3, 2008, near the end of the 2007–08 season, Kopecký tore his Anterior cruciate ligament (ACL) during a game against the Columbus Blue Jackets.
This injury was repaired during surgery on April 22, 2008.
On June 4, 2008, he won the Stanley Cup with the Red Wings, though he did not play a game in the post-season.
After being drafted by the Detroit Red Wings in the 2000 NHL Entry Draft, Kopecký played two seasons of junior hockey with the Lethbridge Hurricanes of the Western Hockey League (WHL). He turned professional with the American Hockey League (AHL), initially with the Cincinnati Mighty Ducks before being assigned to the Grand Rapids Griffins.
Kopecký played four seasons with the Griffins before making his NHL debut with the Red Wings in 2005–06, appearing in one game. The following season, on December 14, 2006, in a game against the Chicago Blackhawks, Kopecký was injured a minute into the third period of the Red Wings' 3–2 victory. Kopecký lost his footing and hit the boards as he approached the Chicago blue line and Blackhawks defenseman Jim Vandermeer then fell on top of him. Kopecký was motionless on the ice for a few minutes before being helped to the dressing room by members of the Detroit training staff. He had surgery the next day to repair a broken clavicle. As a result of this injury, he was limited to just 26 games in 2006–07 season. Kopecký had previously worn the number 28 with Detroit, but switched to 82 after the Red Wings acquired free agent defenseman Brian Rafalski.
On April 3, 2008, near the end of the 2007–08 season, Kopecký tore his Anterior cruciate ligament (ACL) during a game against the Columbus Blue Jackets. This injury was repaired during surgery on April 22, 2008. On June 4, 2008, he won the Stanley Cup with the Red Wings, though he did not play a game in the post-season.
Tomáš Kopecký