Mark Robert Rank

A mathematical approach known as ‘true score theory’ can assess the contribution of luck to a team’s overall success. Bruce Bennett/Getty Images

The luck of the puck in the Stanley Cup – why chance plays such a big role in hockey

With low-scoring games and a preponderance of deflected shots, randomness is much more likely to color NHL teams’ records than those of squads in the other four major US pro sports leagues.

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