Lough has already missed time with a hamstring issue, limiting him to 27 at-bats this spring and only three games since March 15. It's a potential issue for a player competing for a spot on the Opening Day roster.
Lough has hit .185 (5-for-27) with two walks and no extra-base hits in Grapefruit League play.
"He's fighting for a spot," Showalter said. "He came in here competing, not only for more playing time but a spot in general."
With Lough scratched, the Orioles moved Everth Cabrera from second base to center field and started Ryan Flaherty at second base. Showalter said he had planned on moving Cabrera to center field at some point during the game.
Around the horn
• Showalter had high praise for outfielder Nolan Reimold on Tuesday. In camp as a non-roster invitee, Reimold would appear headed for Triple-A Norfolk given the Orioles' outfield logjam.
But the 31-year-old has impressed so far in camp, entering Tuesday with a .296 (8-for-27) average along with five walks, two steals and six RBIs.
"Look out. He could be this year's Steve Pearce," Showalter said. "I like what I see a lot. I don't think you'll find a more athletic guy in the big leagues this year than Nolan Reimold."
• Closer Zach Britton gave up two runs on five hits in the sixth inning of Tuesday's 9-2 win over the Pirates at McKechnie Field. But the results didn't necessarily match the way Britton pitched, as only one ball left the infield, a double by Tony Sanchez.
Britton's inning included four infield singles, a batter reaching on an error and an RBI double-play grounder.
"Zach may have had his best outing of the spring," Showalter said. "And what did they end up with, five hits? I couldn't have drawn it up any better."
• With the Pirates employing a defensive shift against him, Orioles first baseman Chris Davis dropped a bunt for a single in the second inning.
"I asked everybody in the dugout, 'What are they going to do when he comes up next time in the same situation?'" Showalter said. "I'm sure there were a lot of pens wagging in the scouts section. It's one more thing to think about."
• J.P. Arencibia, 2-for-17 with seven strikeouts this spring, will catch three straight Triple-A games starting Wednesday.
"I think he'll benefit from that," Showalter said.