The Orioles and Pirates swapped lefties before the waiver trade deadline Wednesday night, with Kyle Lobstein heading to Baltimore in exchange for Zach Phillips.
Lobstein, 27, was recently designated for assignment by the Pirates after posting a 2-0 record and 3.96 ERA in 25 major-league innings this season. He also posted a 4.11 ERA in 50.1 innings for Triple-A Indianapolis, and will provide the Orioles with a left-handed relief option down the stretch.
Lobstein is a veteran of three major-league seasons with the Tigers (2014-15) and Pirates (2016). He was a second-round pick in 2008 out of Coconino High School in Arizona.
Phillips, 29, has spent the year with Triple-A Norfolk, going 9-3 with a 4.45 ERA in 60.2 innings over 49 relief appearances. He has major-league time with the the Orioles (2011-12) and Marlins (2013) and spent the 2014 season in Japan.
Phillips appears to be an organizational filler at Triple-A for Pittsburgh.