The Sabres assigned forward Alex Nylander and defensemen Brendan Guhle and Brandon Hickey to the Rochester Americans on Monday afternoon.
Nylander staked his claim for a roster spot beginning with a strong performance at the Prospects Challenge, where he finished second in the tournament with five points in three games. He followed that performance with four points in five games during the preseason.
The 20-year-old will look to build on that showing with the Amerks, for whom he scored 27 points (8+19) in 51 games as a second-year pro last season after missing the first month of the season due to an injury.