Ullmark will patrol the blue paint in Boston on Saturday, per TSN 1200 Ottawa.
Ullmark will return to Boston for the first time as a member of the Senators after playing the previous three seasons with the Bruins. The 31-year-old netminder is 2-4-0 with a 3.02 GAA and an .892 save percentage in seven appearances this campaign. Boston has registered only 2.53 goals per game in 2024-25.