Grigorenko will play for the Rochester Americans, three months after the first-round pick briefly refused a demotion to junior hockey.
The 19-year-old Russian began the season in the NHL, but struggled to adapt. He scored two goals in 18 games before being demoted to the Quebec Remparts of the Quebec Major Junior Hockey League on Jan. 11. Grigorenko initially refused to report to Quebec, preferring to develop in Rochester of the American Hockey League. An agreement between the NHL and the Canadian Hockey League does not allow teenagers to play in the AHL.