Karns will hit the open market after being designated for assignment in July and subsequently passing through waivers untouched. The veteran right-hander made four appearances with Baltimore earlier in the season -- allowing seven hits while posting a 5:3 K:BB across 5.1 scoreless innings -- before landing on the IL with a forearm strain.

Karns was sent to the shelf April 9 due to a right forearm strain, and even though he's finally returned to health, the Orioles have elected to send him to waivers.

He gave up three runs while recording just two outs in an outing for High-A Frederick on Friday but is apparently ready to face more advanced hitters. Karns is trending toward an activation in late July.

Karns has made four appearances on his latest rehab assignment, all in rookie ball to date. He's allowed just one run on one hit in 4.1 innings of work, though his 3:3 K:BB isn't particularly encouraging. None of his appearances have been longer than two innings, as he's expected to pitch out of the bullpen when he returns to Baltimore.