New reliever Andrew Miller is in the clubhouse and wearing No. 48. The corresponding roster move will be announced after batting practice.
Orioles left-hander Wei-Yin Chen shut out the Mariners over eight innings last week in Seattle, and he's trying to find the same success tonight in the opener of a three-game series at Camden Yards.
Chen has won his last four starts, and he's lost only once since May 3.
Robinson Cano is 5-for-25 (.200) with two doubles and a home run against Chen. Kyle Seager is 1-for-14 (.071) and Dustin Ackley is 2-for-10 (.200).
The Orioles' last six games have been decided by one run.
For the Orioles
Nick Markakis RF
Manny Machado 3B
Adam Jones CF
Nelson Cruz DH
Chris Davis 1B
J.J. Hardy SS
Delmon Young LF
Caleb Joseph C
Jonathan Schoop 2B
Wei-Yin Chen LHP
The Mariners are starting left-hander James Paxton Saturday night. The spot had been listed as TBA.
The Orioles will face three consecutive southpaw starters.
Ubaldo Jimenez will start Sunday at Triple-A Norfolk. The Tides tweeted confirmation earlier today.
The Athletics announced today that they've released former Orioles closer Jim Johnson, who was designated for assignment last week.