After the draft, Siegfried was assigned to the Boise Hawks of the Northwest League where he made 14 appearances out of the Hawks bullpen. He went 0-1 with a 2.35 ERA and also recorded four saves in four chances.
Siegfried a native of McMinnville, Oregon was drafted in the 11th round of June's amateur draft out of the University of Portland. In 2007 with the Pilots the left-hander made 19 appearances out of the bullpen and also made two starts.
He went 1-2 with a 5.20 ERA while striking out 22 in 36 1/3 innings pitched. In West Coast Conference Play he gave up just six earned runs in 19 2/3 innings while posting a 2.75 average. He limited the opposition during conference play to a .246 average.