The 27-year-old goalie was a restricted free agent and avoided a salary arbitration hearing scheduled for Oct. 26. He was 17-14-3 with a 2.69 goals-against average, a .915 save percentage and one shutout in 34 games for the Sabres last season.
"It's always the time to prove myself," Ullmark said. "It doesn't matter if I'm on a one-, two- or three-year deal or a long-term deal. It doesn't take away the things that I need to do every day to be a starting goaltender in this league."
Selected by Buffalo in the sixth round (No. 163) of the 2012 NHL Draft, Ullmark is 41-41-10 with a 2.81 GAA, a .911 save percentage and three shutouts in 97 NHL games (92 starts).
"The more experience you get the easier everything else gets," Ullmark said. "I've only played my second season now with the Sabres, so I'm fairly new to this NHL hockey. So for every game that comes, it's not going to be easier per se but there certainly are going to be some things that are going to fall into place, both mentally and physically, and how to read the game and how to act on the game."
NHL.com staff writer Mike Zeisberger contributed to this report
