ASTROS -- Designated 3B Morgan Ensberg for assignment. Recalled P Mark McLemore from Triple-A Round Rock.
CARDINALS -- Activated IF Scott Spiezio from 15-day DL. Optioned P Brian Falkenborg to Triple-A Memphis.
DEVIL RAYS -- Recalled IF Ben Zobrist from Triple-A Durham.
METS -- Designated P Jon Adkins for assignment. Recalled former Oriole IF David Newhan. Purchased contract of C Mike DiFelice from Triple-A New Orleans. Optioned P Mike Pelfrey to New Orleans.
PIRATES -- Recalled P Jonah Bayliss from Triple-A Indianapolis.
ROYALS -- Recalled P Leo Nunez from Triple-A Omaha.
TIGERS -- Placed P Kenny Rogers on 15-day DL. Recalled P Jordan Tata from Triple-A Toledo.
BEARS -- Acquired DT Darwin Walker from Bills for a 2008 undisclosed pick.
JETS -- Re-signed G Dominic Moran. Waived K Justin Ayat.
VIKINGS -- Signed RB Adrian Peterson, first-round pick, to five-year contract.
CANADIENS -- Re-signed RW Michael Ryder to one-year contract.