NHL players are among the world's best-conditioned professional athletes. At some point in their careers, however, they all face an inevitable downturn in their performance.
Various factors contribute to a player's decline. Some on this list, like Chicago Blackhawks' Marian Hossa, will eventually be slowed by age. The rigors of a demanding style of play, like that of Detroit Red Wings' Henrik Zetterberg (pictured above), will eventually take its toll. Some, like Calgary Flames' Jiri Hudler, face a potential drop-off in production following a career-best season.
The following slideshow lists 10 NHL stars expected to decline in 2015-16.