White Sox right-hander Javy Guerra was suspended for 50 games Wednesday after failing his second drug test.
The Office of the Commissioner of Baseball said Guerra received a 50-game suspension without pay after a second positive test for a drug of abuse in violation of the Minor League Drug Prevention and Treatment Program.
The suspension is effective immediately.
Guerra, 29, appeared in four rehab games with Triple-A Charlotte earlier this season after beginning the year in the Majors in Chicago's bullpen, where he pitched 1 2/3 scoreless innings of relief over three games. The White Sox placed him on the 15-day disabled list with right shoulder inflammation on April 20 before sending him to Charlotte on a rehab assignment on April 27.
Guerra allowed five runs on five hits while recording two outs in his last appearance on May 5 before the White Sox designated him for assignment a day later. He was outrighted to Charlotte's roster and went back on the DL on May 15.
Players are typically issued a warning following a first positive test for a drug of abuse and a suspension for a second offense. Substances considered "drugs of abuse" by Major League Baseball include cocaine, marijuana, heroin, LSD, ecstasy and other opiates.
The right-hander has appeared in 146 Major League games since 2011 and is 6-9 with a 2.87 ERA in 150 1/3 career innings for the Dodgers and White Sox. He's 28-31 with a 4.28 ERA and 479 strikeouts in 500 1/3 career Minor League innings over 237 outings.
The Denton, Texas native was the Dodgers' fourth-round pick in the 2004 Draft.
Major League Baseball has handed out 69 suspensions to 68 players this year for violations of the Minor League drug program.