The Orioles selected Garcia's contract from Triple-A Norfolk on Sunday.
Baltimore cleared room for Garcia on the 40-man roster and 26-man active roster by transferring Travis Lakins (elbow) from the 15-day injured list to the 60-day IL and by optioning Bruce Zimmermann to Triple-A. Garcia previously made two relief appearances for Baltimore this season, but he's otherwise spent most of the season at Norfolk, where he's produced a 3.00 ERA and 1.11 WHIP across 18 innings.