George Mitchell set a Saturday deadline for evidence in his steroids probe as the sentencing of a former Mets' clubhouse attendant and admitted steroids peddler was delayed until Dec. 14 so he can continue to assist federal prosecutors and baseball officials with their investigations. Mitchell set the deadline to conduct interviews and receive documents and other information for his investigation, CBS News reported on its Web site Wednesday. A baseball lawyer told team officials last month to be prepared for Mitchell, a former Senate Majority Leader and director of the Boston Red Sox, to issue his report by the end of the year.