I dunno man, 5 injuries over 3 years is a lot. Some guys are just more durable than others and being Orioles fans we should know this better than anyone. On one end of the spectrum you've got a guy like Ripken, on the other end you've got the Reimold/Loewen crowd.
You can't watch Hays run the bases or dive for a ball in the outfield without wondering if he just pulled or tweaked something. Reimold, IIRC, was the exact same way. Dude was a walking DL trip before he got to Baltimore, did nothing to change that once he got here.