The penalty was announced Tuesday against the 20-year-old infielder, who is on Kansas City’s 40-man roster but had been optioned to Double-A.
Mondesi is the son of former NL rookie of the year Raul Mondesi. The younger Mondesi was the first player to make his big league debut in the World Series.
A positive test for a performance-enhancing drug usually results in an 80-game suspension, but Major League Baseball and the players’ union agreed to the reduced punishment after Mondesi showed the steroid came from cold medicine. Mondesi says he took the over-the-counter medication without reading the label or consulting his trainer.
He apologised and said he never intended to “take a substance that would give me an unfair advantage on the field.”