Nate Karns (arm) is making another rehab appearance at High-A Frederick on Tuesday night.
Karns has struggled to a 6.43 ERA in seven minor league rehab innings so far between the Gulf Coast League, High-A Frederick, and Double-A Bowie. There is no rush on the Orioles’ part to activate the 31-year-old right-hander, who has been out since April with a forearm strain.