Miller was limited to 29 games in three seasons due to injuries after being acquired in a trade that sent shortstop Dansby Swanson to Atlanta. A former NL All-Star, Miller went 0-4 with a 10.69 ERA in five games last season. He earned $4.9 million after winning in salary arbitration.
Boxberger was 3-7 with a 4.39 ERA and 32 saves in 60 games last season, but struggled late. He made $1.85 million.
Owings played multiple positions in six seasons, hitting hit .206 with four homers and 22 RBI in 106 games this year, when he made $3.4 million. He was demoted to Triple-A Reno late last season after struggling.