The Orioles signed Luis Ayala, who pitched for them in 2012 and 2013 and first baseman Brett Wallace to minor league contracts.
Kevin Gausman gets a start before his likely assignment to Norfolk against the Pittsburgh Pirates.
The Orioles claimed infielder David Adams on waivers from Cleveland and designated left-handed pitcher Kelvin De La Cruz for assignment.
Alex Rodriguez reportedly owes $3 million to attorneys.
Ubaldo Jimenez pitched six solid innings as the Orioles and Tampa Bay Rays played to a 3-3 tie.