Diamondbacks third baseman Agustin Murillo and Cardinals righthander Kenny Maiques were suspended for 50 games for violating Major League Baseball’s drug prevention and treatment program. Murillo tested positive for Clenbuterol, which MLB classifies as a performance enhancer. Maiques was suspended for testing positive for a drug of abuse.

Murillo, 27, was hitting .317/.388/.475 for Triple-A Reno in the Pacific Coast League. He passed his drug tests this spring, apparently, as he played for Mexico in the World Baseball Classic. He also had a strong Mexican Pacific League this winter, hitting .345 with 11 home runs and league highs of 87 hits, 30 doubles and 150 total bases. Murillo signed with Arizona in October 2002 and spent both 2007 and 2008 on loan to the Mexican League.

Maiques, 23, was having a rough season at Double-A Springfield, walking 13 in 3 2/3 innings. He signed in 2006 as a draft-and-follow out of Rio Hondo (Calif.) JC. He was a 37th-round pick in 2005 and touched 94 mph with his fastball prior to having Tommy John surgery. Maiques had 31 saves in 2007 at low Class A Quad Cities.