What would a day of Orioles baseball be without a roster move?
Pearce, who was playing for the Yankees' Triple-A club in Scranton/Wilkes-Barre, is expected to be available for Sunday's series finale.
"I know him a little bit from spring training," Orioles manager Buck Showalter said. "Our people thought he has the potential to help us [at] outfield and first base. He was second or third in the International League in hitting. [We're] trying to continue to do some things to offset some of the injuries, and hopefully he'll help."
To make room for Pearce, the Orioles designated infielder-outfielder Bill Hall for assignment for the second time in nine days.
Pearce was hitting .321/.422/.574 with 11 homers and 30 RBI in 52 games with Scranton/Wilkes-Barre. He was eligible to opt out of his contract, and the amount of money exchanged to add Pearce was miniscule.
The 28-year-old spent parts of five big-league seasons with the Pirates, hitting .232/.302/.366 with nine homers and 52 RBI in 185 games.
With the Orioles in need of outfield depth, the club believed bringing in Pearce was a better option than some of the existing ones in Triple-A Norfolk, which include Lew Ford, Jamie Hoffmann and Jai Miller. The Orioles also want to keep 22-year-old rookie Xavier Avery in the minors for more seasoning.
"We've got some good options there," Showalter said. "Lew Ford's still trying to really establish himself from the Atlantic League to that level. He's had some injury stuff here and there. From what I can understand gathering all the information and knowledge, they thought [Pearce] was our best option, and we thought that."