"Dariel's been consistent down there," manager Buck Showalter said. "He's done pretty good, and Miranda wouldn't be available for three days. Wanted to make sure we had a fresh arm down there. It was Aquino's day to pitch, anyway. I'm pretty proud we came out of four tough days pitching [in Seattle], and we have just about everybody available today."
The 23-year-old Aquino went 4-7 with a 3.25 ERA and 55 strikeouts over 14 appearances (13 starts) with Bowie. He held hitters to a .269 (84-for-312) batting average this season while allowing 22 walks. He was acquired by the Orioles on April 7 from the St. Louis Cardinals in exchange for cash considerations and has also been in the Colorado, Toronto, Pittsburgh and Cleveland organizations. He will be making his Major League debut.
Álvarez, 27, hit .271/.309/.363 with three home runs, 21 doubles, and 33 RBIs in 82 games this season with Norfolk. He made his Major League debut last season and played 12 games with the Orioles, batting .241/.290/.370.
Miranda made his Major League debut Sunday at Seattle and allowed three earned runs over two innings.
Brittany Ghiroli has covered the Orioles for MLB.com since 2010. Read her blog, Britt's Bird Watch, follow her on Facebook and Twitter @britt_ghiroli, and listen to her podcast. This story was not subject to the approval of Major League Baseball or its clubs.