Nobody is sure when Peavy can pitch again. He may not even be able to pitch again this season. Peavy is an ace who has been bothered by injuries recently. Peavy contract is not up until 2012 and he has an option for 2013.
Poreda is a highly-ranked prospect who may enter the Padres rotation immediately. In 10 games with the White Sox, the 22-year old Poreda has a 2.45 ERA. He is projected to someday become a top starter.
Richard is 4-3 with a 4.65 ERA in the White Sox rotation. The Padres got a pretty good return for Peavy. Peavy might not help the Sox run this season, so that's why this deal confuses me. Could they have put a similar package together for Roy Halladay? Nobody knows.