O'Brien was in the lineup for the third time in four games in Tuesday's 3-2 win over the Maple Leafs.
O'Brien has taken on a bottom-six role in the absence of Kailer Yamamoto (upper body). In three appearances this season, O'Brien has 10 hits, seven PIM, five blocked shots and two shots on net. His playing time is rising for now, but once Utah's forward group is healthy, the 32-year-old is not a lock to stay in the lineup.