O'Reilly was promoted from AHL Syracuse on Tuesday.
O'Reilly, who was selected by the club with the 32nd overall pick in the 2024 NHL Draft, has notched two goals and two assists in 12 games for the Crunch this year. With Brayden Point (undisclosed) landing on injured reserve, the 20-year-old O'Reilly could be in line to make his NHL debut versus the Sabres on Wednesday.