Right guard John Greco , who had never played center during a game in his career , slid over .
Right guard John Greco , who had never played center during a game in his career , took Mack 's spot , and Paul McQuistan came off the bench .
Right guard John Greco , who had never played center during a game in his career , slid over and took Mack 's spot , and Paul McQuistan came off the bench .