The weather forecast could affect the timing of the moves.
The 24-year-old Adams was listed in the starting lineup Friday batting ninth even though the moves were not yet official. He was to make his major league debut.
Adams was hitting .303 with two homers and eight RBI. Reimold was batting .237 with six homers and 22 RBI.
The Orioles optioned left-hander Troy Patton to Norfolk. Patton and right-hander Chris Jakubauskas, who was sent to the minors after Thursday's 13-0 loss to the Yankees, both pitched in the lopsided defeat.
Jakubauskas and Patton had replaced first baseman Derrek Lee (strained left oblique) and second baseman Brian Roberts (concussion) on the roster Thursday. Lee went on the 15-day disabled list and Roberts was placed on baseball's new seven-day DL for concussion-related symptoms.