The decision benefited Sandin as well as Sault Ste. Marie.
Sandin (5-foot-11, 186 pounds) led all OHL rookies with a plus-35 rating, and led all OHL rookie defensemen in goals (12), assists (33) and points (45) in 51 games. He led all OHL rookies with 12 assists and 13 points in 24 OHL playoff games.
He had one assist, a plus-2 rating and one shot on goal for Team Don Cherry in the Sherman-Williams CHL/NHL Top Prospects Game at Sleeman Centre in Guelph, Ontario, on Jan. 25.
"[Sandin] is a great player and has been a key addition to our team," said Sault Ste. Marie center Barrett Hayton, No. 9 on Central Scouting's final list of North American skaters. "He's very smart and can create plays. He's helped our team a lot."
Sandin, a left-handed shot, had 21 points (four goals, 17 assists) during Sault Ste. Marie's 23-game winning streak from Oct. 28-Dec. 30.
Sandin, whose style has been compared to Chicago Blackhawks defenseman Duncan Keith, offers good hockey sense, competitiveness and passing ability.
"His hockey IQ is off the charts," said Karl Stewart of NHL Central Scouting. "You can't hit him; he's so elusive and mobile. He's got eyes in the back of his head and he never puts his teammates in a bad spot with the puck. When he passes to his winger, they have time and space to do something with it.
"There's a lot of upside here because he'll add strength and weight, and he can already quarterback a power play."