The Yankees signed right-hander Sidney Ponson to a minor league contract on Wednesday, according to The Associated Press. GM Brian Cashman was looking to add depth to the team's pitching staff after losing Chien-Ming Wang to a serious foot injury. Ponson performed well on the mound, going 4-1 with a 3.88 ERA for the Rangers earlier this season but was released because he was a disruption to the team.