The NBA is filled with insomniacs. When point guard Rajon Rondo was in Boston, he used to watch Celtics replays at 2 a.m., then call power forward Kevin Garnett at 4 for a debrief. When Derrick Rose was in Chicago, he kept a key to the Bulls practice facility so he could play cutthroat with his roommates in the middle of the night. Kobe Bryant’s sunrise workouts became the stuff of legend in Los Angeles, but the Mamba wasn’t necessarily setting his alarm at dawn. He was usually awake anyway. Celtics forward Gordon Hayward has sat out this whole season, after breaking his ankle Opening Night, but sleep remains elusive. He plays video games, specifically Destiny 2, until his lids close.