Ishikawa, 29, batted .257/.329/.428 in 94 games with Milwaukee in 2012. He batted .265/.327/.400 with 15 home runs and 80 RBIs in 281 games with San Francisco over four seasons (2006, 2008-10).
In his career, Ishikawa has batted .266/.333/.416 with 18 home runs in 741 plate appearances against right-handed pitching.
Schlereth, 26, made six appearances with Detroit in 2012, posting a 10.29 ERA in seven innings. He had a 2.79 ERA over 9 2/3 innings in 11 games with Triple-A Toledo (three) and Single-A Lakeland (eight).
A first-round pick of Arizona in the 2008 First-Year Player Draft, the 26th overall selection, Schlereth has struck out 91 batters in 94 innings in four seasons with the Diamondbacks and Tigers. He's held left-handed hitters to a .213/.320/.368 line in 184 plate appearances.
Schlereth is the son of former NFL offensive lineman Mark Schlereth.
Braddock, 25, went 1-3 with a 4.41 ERA and 59 strikeouts in 51 innings for Milwaukee in 2010-11. He posted a 2.94 ERA over 33 2/3 innings, with 11 strikeouts per nine innings, in 2010. He also held left-handed hitters to a .185/.313/.296 line and 28 strikeouts in 99 plate appearances.
The Orioles have invited 11 non-roster players to spring training. Pitchers and catchers report Feb. 12, with position players arriving Feb. 15.