Yasmani Grandal banned 50 games
The commissioner's office announced the drug penalty Wednesday. The ban will start 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."
There have been seven suspensions this year under the major league program. Six of them were for peformance-enhancing drugs -- including Melky Cabrera and Bartolo Colon for positive testosterone tests -- and one for a stimulant.
The seven suspensions are the most in a year under the big league drug program since there were eight in 2007.
There have been 101 suspensions this year under the minor league drug problem.
Copyright 2012 by The Associated Press