Grigorenko agreed to a three-year deal to return to CSKA Moscow.
Grigorenko scored a goal on two shots and added four PIM in Sunday's 4-3 overtime loss to the Lightning.
Grigorenko was promoted to the active roster Sunday.
Grigorenko was reassigned to Columbus' taxi squad Friday.
Grigorenko was recalled to the active roster Thursday.
Grigorenko was reassigned to Columbus' taxi squad Tuesday.
Grigorenko was promoted to the active roster Monday.
Grigorenko was assigned to the taxi squad Sunday.
Grigorenko was promoted to Columbus' active roster Thursday.
Grigorenko cleared waivers Wednesday and was assigned to the taxi squad, Mark Scheig of The Hockey Writers reports.