The Royals recalled Bowlan from Triple-A Omaha on Sunday.
The right-hander will provide Kansas City with a fresh arm in the bullpen, but he's unlikely to be entrusted with a high-leverage role. Over his previous stints in the majors this season, Bowlan has made 17 appearances and has delivered a 4.94 ERA, 1.35 WHIP and 21:9 K:BB in 23.2 innings.