The Orioles designated Maton for assignment Sunday.
He'll give up his spot on the roster to outfielder/designated hitter Heston Kjerstad (concussion), who was reinstated from the 10-day injured list in a corresponding move. After being called up from Triple-A Norfolk on Sept. 2, Maton saw action in five games for the Orioles and went 0-for-5 with two strikeouts.