"We brought him in, he's in the mix. There's a bunch of guys in that mix," Rays manager Kevin Cash said.
Miller has pitched in the Major Leagues in parts of each of the last four seasons. The bulk of that duty came in a 48 2/3-inning stint with the 2012 Athletics, when he posted a 2.59 ERA with 44 strikeouts and just 27 walks.
Miller has a career 3.48 ERA along with 7.9 strikeouts per nine innings in parts of five Major League seasons.
Bill Chastain is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.