 His season totals with the Red Sox included 50 appearances with a 3–5 W–L, 2.34 ERA, 13 walks and 69 strikeouts in innings.On July 31, 2014, Boston traded Miller to the Baltimore Orioles for minor-league pitcher Eduardo Rodríguez.On September 7, 2014, Miller completed a scoreless 11th in a 7−5 victory over Tampa Bay for his first career save.