James Bolin, a portfolio manager and secretary of Appaloosa Management, has left the firm to join Citadel Investment Group in Chicago. An official at Appaloosa confirmed he left last month, but could not comment further, referring calls to Ron Goldstein, v.p. and cfo. Goldstein did not return calls by press time. Bolin has joined Brad Couri's group at Citadel, according to a source, who added that Bolin would concentrate on distressed debt. Bolin and Couri also did not return calls.