Gordon Hayward suffered one of the most gruesome injuries in NBA memory midway through the first quarter of tonight’s tip-off game against the Cavaliers when his ankle snapped just minutes into his tenure with the Celtics.

Hayward signed a four-year, $128 million contract over the summer, leaving Utah to come to Boston and join an already-loaded Celtics team.

Update (8:56 p.m.):

Post has been updated to reflect the Celtics’ announcement.

[TNT]