The Pirates optioned Kelly to Triple-A Indianapolis after Sunday's 14-5 win against the Brewers, Alex Stumpf of MLB.com reports.
The right-hander was called up from Indianapolis on Friday and allowed three runs over two innings during Sunday's blowout victory. Kelly surrendered two runs over 2.1 frames in his MLB debut earlier this season, so his big-league career is off to a bit of a bumpy start with multiple runs allowed in both of his appearances.