That means Garrett Atkins' job status could be in serious jeopardy. Atkins is hitless in his last 14 at-bats and is batting .221 with no home runs and six RBIs.
Scott, meanwhile, has hits in nine of his last 10 games. He's batting .459 (17-for-37) with six home runs and 11 RBIs during his hot streak.
"Luke Scott right now is swinging the bat well," manager Dave Trembley said. "We're going in to play the Nationals with no DH. I've got to try to find a way to get a lineup with the best eight guys in there for us. That's why you see Luke Scott play first base today, probably in anticipation of him doing that against the Nationals."
Trembley said the move obviously impacts Atkins for Thursday night and likely the weekend.
"Beyond this weekend, I couldn't tell you what's going to happen other than the fact that we'll have to see what move we make to add the other position player," Trembley said. "I don't think anybody could disagree that we have to do something to try and get some run production out of that position.
"That's probably the best way I can put it," Trembley added.
The Orioles currently are carrying 13 pitchers, and Trembley said he wants an extra position player in case of a double-switch playing in an NL park. The Orioles could go with another first baseman when they make a roster move Friday, calling up either Miguel Abreu or Scott Moore, which could further impact Atkins.