Ullmark is seeking an average annual value of $2.65 million, while the team is countering with an offer of $800,000 per season.
The 26-year-old netminder earned $750,000 in 2018-19. He split time with veteran Carter Hutton, who makes $2.75 million annually. Here's how the two goalies performed:
Meanwhile, Buffalo has one of the league's best goalie prospects, Ukko-Pekka Luukkonen, brewing in its system.