Miller, 28, went 1-2 with a career-best 2.64 ERA for the Red Sox last season but was limited to 37 games due to a left foot injury that required season-ending Lis-Franc ligament repair surgery on July 15. Prior to the injury, he struck out 48 batters in 30.2 innings for a career-high 14.1 strikeouts per nine innings, the highest mark among American League relievers with at least 30.0 innings pitched.
A first-round selection by Detroit in the 2006 June Draft, Miller is 25-33 with a 5.33 ERA in 186 career major league games, including 66 starts, with the Tigers (2006-07), Marlins (2009-10), and Red Sox (2011-13). He has a 4.24 ERA and 149 strikeouts in 136.0 innings as a member of the Red Sox.
With today's agreement, the Red Sox have no remaining unsigned players eligible for salary arbitration.