Armando Galarraga will face off against Roy Oswalt to try and stymie Team USA's chance to make up for 2006's rather dismal showing in the WBC. According to BPro, making it out of Round 1 gives USA the greatest odds of being crowned champions, but their odds of making it out of Round 1 unscathed were lower than that of Japan, the Domincan Republic, Cuba, and Korea. The Venezuelans represent Team USA's greatest challenger, so the Wizard hasn't been given an easy assignment.
"In my head, I've pitched against some of these guys before," Oswalt said, "so I know kind of a way to get some of those guys out."
(Source)
Hopefully Roy O knows the above more than just "kind of" and won't disappoint.