Garrett Olson has been lights out the past 9 games:

6-1, 1.33 ERA, 0.84 WHIP, 63K's/18BB in last 61 innings.  

He hasn't been that bad the rest of the year either as he's sporting an ERA under 3 and a Whip around 1.   Hitters are hitting just .205.  Also, he sports a really good ground ball/fly out ratio of 1.10.

I'm curious as to why he's still sitting in AAA while Cabrera and Trachsel continue to flail along with the major league club.  Call him up already!