Ramirez, who was suspended for 50 games by Major League Baseball for a violation of the drug policy, would be eligible to join the club Wednesday. He went on a 10-day rehabilitation assignment to Triple-A Sacramento, with the goal being that he would rejoin the big league club as soon as he was ready.
But A's assistant general manager David Forst said Monday that Ramirez would not be called up when he is initially eligible.
"We will continue to monitor Manny's progress on a day-to-day basis in hopes of bringing him to Oakland just as soon as he is ready to contribute at the Major League level," Forst said.
Because Ramirez's rehab assignment expired Monday, he was ineligible to play Tuesday. Moreover, the club announced that Ramirez would not join the team Wednesday. That means a Friday appearance in Kansas City, when Yoenis Cespedes is also expected back, could be more realistic.
Ramirez, who had two hits Monday, batted .250 in 32 at-bats with Sacramento.