Fletcher exercised an opt-out clause in his minor-league contract with the Pirates on Wednesday and is now a free agent, Robert Murray of FanSided.com reports.
Fletcher has hit .289/.382/.496 with seven home runs and a 18:22 BB:K over 40 games this season with Triple-A Indianapolis. The 28-year-old will look for a new organization but could have to accept another minor-league deal.