Valencia is 7-for-10 lifetime against Price, the reigning American League Cy Young Award winner.
Brian Roberts is leading off tonight, as manager Buck Showalter goes with a right-handed lineup. Roberts has 11 hits in his last 23 at-bats, with seven RBIs.
Nick Markakis moves down to seventh.
J.J. Hardy is back in the lineup after missing the last two games with spasms and tightness in his back.
Reliever Francisco Rodriguez says he feels fine and can pitch tonight.
For the Orioles
Brian Roberts 2B
Manny Machado 3B
Chris Davis 1B
Adam Jones CF
Matt Wieters C
J.J. Hardy SS
Nick Markakis RF
Danny Valencia DH
Steve Pearce LF
Chris Tillman RHP
Wilson Betemit has returned to Single-A Frederick to continue his injury-rehab assignment, which runs through Aug. 25. Double-A Bowie is on the road, so Betemit moved down one level.
Betemit went 3-for-9 with three RBIs with the Keys on Aug. 12-13. He played five games with Bowie, going 6-for-17 with three RBIs and four walks. Betemit began his rehab assignment with the Gulf Coast League Orioles on Aug. 6 and played five games, going 6-for-16 with two doubles and three RBIs.