Harris had spent the last seven years with the Cubs, working up to an assistant GM role and emerging as one of the most trusted voices in the front office under Theo Epstein and Jed Hoyer. The Giants officially introduced Harris as their new GM Monday, leaving the Cubs with even more turmoil to address this winter. In September, the Cubs had already moved Jason McLeod over to the big-league front office from his previous role as vice president of amateur scouting and player development, but McLeod won't be an exact replacement for Harris.