Lorenzen (lower body) struck out three and allowed an unearned run on one hit in two innings out of the bullpen in Saturday's 2-1 loss to Atlanta.
Lorenzen made his final start of the regular season last Wednesday, when he tossed two-plus innings against the Nationals before leaving early due to lower-body fatigue. He made his return to action out of the bullpen a few days later, with the clean appearance assuaging any concerns about his health. He was included on the Royals' 26-man wild-card roster but went unused during the club's two-game sweep of the Orioles.