Feb 8 (Reuters) - Major League Baseball (MLB) says it fully investigated a 2008 incident in which former Boston Red Sox pitcher Curt Schilling was allegedly advised by a team employee to take performance-enhancing drugs before the matter was closed. In an interview with ESPN Radio earlier this week, three-times World Series champion Schilling claimed he had been offered drugs by a Red Sox employee that year as "a potential path" for him to continue his pitching career.