Miller conceded after Sunday's loss to the Cubs that he's dealt with a minor right lat injury since his July 24 start against the Rangers, Adam Jude of The Seattle Times reports.

Miller had a start pushed back one day when he first began feeling discomfort in his lat. He's taken the ball on turn since then, but the results have not been there, with the hurler logging a 7.92 ERA, 1.50 WHIP and 21:15 K:BB over 30.2 frames covering his last six outings. A move to the bullpen for Miller is possible, but the health of Bryan Woo (shoulder) complicates the decision. For now, Miller is tentatively lined up to start Sunday's game in Toronto.