San Diego Padres catcher Yasmani Grandal has been suspended 50 games because of a positive test for testosterone.
The commissioner's office announced the drug penalty on Wednesday. The ban will take effect at the start of next season.
Grandal made his big league debut this year. He hit .297 with eight home runs and 36 RBIs in 60 games. He turns 24 on Thursday.
"I apologize to the fans, my teammates and to the San Diego Padres," he said in a statement. "I was disappointed to learn of my positive test and under the joint drug program. I am responsible for what I put into my body. I must accept responsibility for my actions and serve my suspension."
Grandal was acquired by the Padres from Cincinnati last December. The Cuban native was traded by the Reds with pitcher Edinson Volquez in a package for pitcher Mat Latos.