BASEBALL

Major League Baseball

MLB-Suspended New York Yankees minor league RHP Justo Arias and LHP Rafael Martinez and Chicago Cubs minor league RHP Jhon Rodriguez for 50 games each for testing positive for banned substances. The suspensions will be effective at the start of next season.

American League

BOSTON RED SOX-Placed RHP Josh Beckett on the 15-day DL, retroactive to August 18. Placed 1B Sean Casey on the 15-day DL, retroactive to August 20. Purchased the contract of C David Ross from Pawtucket (IL). Transferred SS Julio Lugo from the 15- to the 60-day DL.

CLEVELAND INDIANS-Activated C Victor Martinez from the 15-day DL. Designated INF Andy Gonzalez for assignment.

National League

ARIZONA DIAMONDBACKS-Activated OF Justin Upton from the 15-day DL. Recalled RHP Max Scherzer from Tucson (PCL). Optioned OF Alex Romero and RHP Leo Rosales to Tucson.

ATLANTA BRAVES-Added RHP Elmer Dessens to the 25-man roster. Optioned RHP Charlie Morton to Richmond (IL).

COLORADO ROCKIES-Activated LPH Brian Fuentes from the bereavement list. Optioned RHP Steven Register to Colorado Springs (PCL).

HOUSTON ASTROS-Extended the contracts of RHP Brian Moehler and OF Darin Erstad through the 2009 season.