American League

BALTIMORE ORIOLES—Traded INF Mike McCoy to Colorado for INF Juan Castro. Sent SS Freddie Bynum outright to Norfolk (IL). Placed RHP Greg Aquino on the 15-day DL, retroactive to July 13. Activated RHP Randor Bierd from the 15-day DL.

OAKLAND ATHLETICS—Placed 1B Daric Barton on the 15-day DL, retroactive to July 14. Recalled INF Wes Bankston from Sacramento (PCL).

National League

CINCINNATI REDS—Placed RHP Jared Burton on the 15-day DL. Recalled RHP Todd Coffey from Louisville (IL).

COLORADO ROCKIES—Optioned INF Jayson Nix to Colorado Springs (PCL). Recalled INF Ian Stewart from Colorado Springs.

HOUSTON ASTROS—Placed RHP Roy Oswalt on the 15-day DL.