CSNBayArea.com reports that the A's have traded infielder Jack Hannahan to the Mariners for minor league righthander Justin Souza. Hannahan was hitting .193-.278-.303 in 134 plate appearances this year, not to mention spending some time in the minors.
Souza, 23, was Seattle's ninth round selection in the 2006 draft, and had a 3.35 ERA working mostly as a starter in Double-A. He was not one of the Mariners top 30 prospects coming into the season according to Baseball America.
