After recovery from an early injury , he was assigned to begin the 2015 -- 16 season with the Rochester Americans of the American Hockey League ( AHL ) .
In his first season in North America , Ullmark attended the Sabres training camp .
After recovery from an early injury , Ullmark was assigned to begin the 2015 -- 16 season with the Rochester Americans of the American Hockey League ( AHL ) .
In his first season in North America , Ullmark attended the Sabres training camp .