Hahn (shoulder) was reinstated from the 10-day injured list Thursday.
Hahn left Wednesday's rehab appearance with a trainer after he faced just one batter, but the issue apparently wasn't serious. The right-hander spent just over a month on the injured list but will now rejoin the Royals' bullpen going forward. Hahn made five relief appearances to begin the season and posted a 13.50 ERA and 2.70 WHIP in 3.1 innings.