An obscure provision in the NHL's labor agreement allows its franchises to replace an injured player on its roster by offering a 24-hour tryout to an amateur player.

WSJ: NHL: Obscure Rule Lets Paul Deutsch Go Pro for 24 Hours

His father was an amateur clarinet player who gave Adams lessons on the instrument when he was in grade school.

NPR: John Adams: 'Grand' And 'Gnarly' In Concert

The self-described music lover and amateur keyboard player who was once "absolutely terrorized" by a harmony professor at Juilliard's evening division announced the donation at a news conference Tuesday, two days after his 61st birthday.

NPR: Juilliard Chairman Donates Trove of Rare Artifacts