12. Gordie Howe
Howe is a legendary figure in the hockey world. Remarkably, in his final full year in the NHL, he helped the Hartford Whalers to the playoffs at the age 0f 51. Insanely, he was a 23-time All-Star and holds many hockey records. These include the most professional seasons and games played.
In 1997, he returned for a single game with the Detroit Vipers, which technically means he played in six different decades. Howe is one of the most complete players ever to play hockey. Furthermore, he even played alongside his sons with the Houston Aeros. Surely, that was one of the highlights of his career and something no other hockey player will likely accomplish.