Some interesting tidbits...
April 2011 vs. April 2012
12-13 vs. 14-9
4.16 runs/game vs. 4.17 runs/game
4.47 ERA vs. 3.03 ERA
April's 3.03 team ERA is the lowest the Orioles have had in any month since September 2004, when they posted a 3.01 ERA and went 18-10.