Davies, 22, entered the 2015 season as the sixth-best prospect in the Orioles organization according to Baseball America. He was selected by Baltimore in the 26th round of the 2011 First-Year Player Draft. He has gone 27-29 with a 3.47 ERA in 101 games (81 starts) during his career in the minor leagues (2012-15), including 5-6 with a 2.84 ERA in 19 games (18 starts) at Triple-A Norfolk this season.
Parra, 28, batted .312 with 12 HR and 41 RBI in 146 games as a Brewer (2014-15). He was acquired from the Arizona Diamondbacks last July 31 in exchange for outfielder Mitch Haniger and left-handed pitcher Anthony Banda. Parra is batting .328 with 9 HR and 31 RBI in 100 games this season. The two-time Gold Glove Award winner (2011 and 2013) is a career .279 hitter with 51 HR and 291 RBI in 933 games between Arizona (2009-14) and Milwaukee.