McIlrath was placed on waivers Sunday, per Tom Gulitti of NHL.com.
Taylor was returned to AHL Texas on Sunday.
Washington acquired Poirier from New Jersey on Sunday in exchange for a 2027 seventh-round pick.
Heiskanen notched two assists and two blocked shots in Saturday's 3-1 win over the Blue Jackets.
Harley scored a goal on two shots in Saturday's 3-1 win over the Blue Jackets.
Rantanen scored a power-play goal on three shots in Saturday's 3-1 win over the Blue Jackets.
Hyry scored an empty-net goal on four shots, dished an assist, went plus-2 and added three hits in Saturday's 3-1 win over the Blue Jackets.
Oettinger stopped 24 of 25 shots in Saturday's 3-1 win over the Blue Jackets.
Scott scored twice in AHL Texas' 6-3 loss to Chicago on Saturday.