The Baltimore Orioles sent pitcher Jake Arrieta down to Triple-A Norfolk on Monday.
Arrieta, 27, is 1-1 with a 5.40 ERA this season, and he has had control problems. In 19 innings of work over four starts this season, he has given up a league-high 16 walks. He has also yielded 15 hits and 14 runs.
He walked five and also hit a batter in his four innings of work on Sunday.