Tim Schaller and Jerry D'Amigo were also called up from AHL Rochester on Tuesday before the Sabres play at Tampa Bay.
The moves came a day after Buffalo dealt three forwards and goalie Michal Neuvirth in four separate deals. In return, Buffalo acquired New York Islanders backup goalie Chad Johnson, minor-league prospect Jack Nevins and four draft picks.
Grigorenko is Buffalo's 2012 first-round draft pick, who has four goals and six assists in 55 career games with the Sabres.
Schaller leads Rochester with 15 goals, and rejoins Buffalo for a third time this season.
D'Amigo has yet to play for the Sabres since being acquired in a trade with Columbus in December.
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