Hockey teams need to have good chemistry in the locker room. Perhaps more than in any other sport.
Baseball history is littered with teams that did not like each other but managed to win championships. The 1972-74 Oakland A's won three straight World Series titles, but Reggie Jackson and Bill North exchanged punches on the locker-room floor.
The 1977-78 Bronx Zoo Yankees, featuring manager Billy Martin, Thurman Munson and Jackson (sense a pattern here?), won back-to-back titles.
The NFL has featured many teams with cliques and factions that did not speak but won titles. NBA teams feature smaller rosters and are less likely to have problems, but they are not often as close as hockey teams.
A successful season is often associated with a tight locker room. Recent champions like the Chicago Blackhawks, Los Angeles Kings and Boston Bruins all feature teams whose players had close, personal relationships.
But sometimes it goes the other way. As the 2013-14 begins to get some traction, here's a look at six teams that could develop chemistry issues as the season moves forward.