Seattle also optioned infielder Carlos Triunfel to Tacoma and designated infielder Alex Liddi for assignment.
Miller was in the ninth spot in the lineup. He was on a 22-game hitting streak or Tacoma, hitting .356 with six home runs and 28 RBI in 26 games after starting the year with Double-A Jackson.
"He's been playing fantastic in Triple-A, and he made a good impression on us in spring training," Seattle manager Eric Wedge said. "It's a good time to take a look at him."
Triunfel was 2 for 24 in nine games and Liddi 1 for 17 in eight games.