The Pirates optioned Simon to Triple-A Indianapolis on Monday, Kevin Gorman of TribLive.com reports.
Simon will give up his spot on the 26-man active roster to outfielder Oneil Cruz (hand), who was reinstated from the 60-day injured list. After getting the call from Triple-A on Aug. 5, Simon saw a fairly steady role for the Pirates, starting in eight of the club's ensuing 11 games while slashing .290/.333/.323 with one stolen base, four runs and two RBI over 34 plate appearances.