The Baltimore Orioles have promoted right-handed pitcher Jon Keller to the Frederick Keys in the High-A Carolina League.

Keller, from Cedar Rapids, got the good news Thursday night after pitching 2.2 scoreless innings for Delmarva in the Low-A South Atlantic League.

Keller, 21, was named Baltimore's Minor League Pitcher of the Month for June.

Keller compiled a 3-0 record and 1.59 ERA with five saves for Delmarva. He pitched 56.2 innings in 24 games, with 66 strikeouts and only 14 walks. He allowed 39 hits and 11 runs (10 earned). Opponents hit only .192 against him.

Baltimore selected Keller in the 23rd round of the 2013 draft from the University of Tampa.