sentence: Winners are selected based on regular-season play.
sentences_after: Up until 1981, the Vezina Trophy had been awarded under that definition, but it was later changed and replaced by the Jennings Trophy. Since it began in 1982, it has been awarded at the end of 25 seasons to 27 different players.
concept_name: winner
headings: William M. Jennings Trophy
categories: National Hockey League trophies and awards