Donald Fehr is in one of the great labor battles of his career.
The executive director of the NHL Players' Association is certainly used to negotiating with management types who are not hesitant to push players to the limit when they negotiate.
Fehr, 64, had a long career with the Major League Baseball Players' Association before he came to the NHL in 2010.
Fehr worked with the legendary Marvin Miller during much of his tenure with the MLBPA before becoming that organization's executive director.
Fehr ultimately built a strong relationship with Major League Baseball. While a brutal work stoppage wiped out the conclusion of the 1994 season and caused the sport to cancel the playoffs and World Series, labor relations in baseball afterwards improve dramatically. In fact, Major League Baseball has not had a work stoppage since.
The current NHL lockout is into its third month and will almost certainly spill into a fourth. It could wipe out the entire season.
Fehr will see the lockout through. He will eventually hammer out a new Collective Bargaining Agreement with NHL commissioner Gary Bettman.
When that happens, Fehr may decide that enough is enough. He could decide to call it a career and retire, or possibly move on to an advisory role.
Here's a look at five former players (four competed in the NHL) who could replace him.