O'Regan scored 34 points (18+16) in 53 games with the Amerks this season. The 25-year-old winger appeared in 21 NHL games last season, including two with the Sabres after being acquired from the San Jose Sharks at the trade deadline.
Wilson underwent surgery to repair a fractured ankle in early October. He was assigned to Rochester on Jan. 9 and scored seven points (3+4) in 17 games with the Amerks. He scored 14 points (6+8) in 49 games for the Sabres after being acquired from the Detroit Red Wings in December of last season.
The Sabres still have seven healthy defensemen on the roster with Casey Nelson back from an upper-body injury. Housley said the decision to assign Pilut to Rochester was made to allow the rookie to continue his development playing consistent minutes.
Before joining the Sabres, Pilut tallied 22 points (3+19) in 16 games with the Amerks.
"Lawrence's development is right where it should be," Housley said. "He's played a lot of good hockey for us. He's played 25 games to this point. I think his play has slipped. Just get him back down to Rochester and play some more meaningful minutes, and we'll see where that takes it."
The Sabres also placed Kyle Okposo on injured reserve Friday, but Housley said the forward did skate this morning. Okposo sustained a concussion during a fight with New York Rangers defenseman Tony DeAngelo on Feb. 15.
"That's a great sign," Housley said. "He's got a smile on his face, so those all are good signs for us."
Carter Hutton will start in net for the Sabres, coming off a 39-save effort in Tampa on Thursday.
It will be the series finale between the Sabres and Capitals. Each of the first two matchups were one-goal affairs won by the Capitals in Washington.
"I feel that we're going to have to be a little bit heavier in the battle tonight," Housley said. "They've got a heavy team. They protect the puck well. We have to get geared up for that type of game."
Coverage on MSG-B begins at 12:30 p.m., or you can listen live on WGR 550. The puck drops at 1.
