He had possession so it wouldnt have mattered
Unless he just caught a pass then it is offsides
I was always under the impression it was possible to go offsides on yourself. (a) and also Note 2 seems to imply that. Unless there is a different interpretation of the rule somewhere.
Rule 72. Off-sides
(a) Players of the attacking team must not precede the
puck into the attacking zone.
Note 1: If a pass deflects off a defending player, his
skates or his stick, causing an attacking player to precede
the puck into the attacking zone, the off-side rule
shall apply.
Note 2: A player actually propelling the puck who shall
cross the line ahead of the puck, shall not be considered
off-side, providing he is actually in possession and
control of the puck with one skate in the neutral zone
before crossing the blue line.