BASEBALL

American League

BALTIMORE ORIOLES—Placed LHP Jamie Walker on the 15-day DL, retroactive to June 26. Activated LHP Adam Loewen from the 15-day DL.

CLEVELAND INDIANS—Agreed to terms with LHP Eric Berger.

NEW YORK YANKEES—Recalled OF Brett Gardner from Scranton/Wilkes-Barre (IL). Optioned OF Justin Christian to Scranton/Wilkes-Barre. Designated C Chris Stewart for assignment.

National League

HOUSTON ASTROS—Released RHP Shawn Chacon.

LOS ANGELES DODGERS—Placed OF Juan Pierre on the 15-day DL. Recalled OF Jason Repko from Las Vegas (PCL).

WASHINGTON NATIONALS—Promoted C Luke Montz and INF Ofilio Castro to Columbus (IL), 1B Bill Rhinehart, 3B Leonard Davis and OF Edgardo Baez to Harrisburg (EL), and OF Aaron Seuss and SS Daniel Lyons to Potomac (Carolina).

American Association

LINCOLN SALTDOGS—Signed LHP Dan Knox.

ST. PAUL SAINTS—Released RHP Alec Shepherd.

Golden Baseball League

ORANGE COUNTY FLYERS—Released OF Rich Pohle.

Northern League

FARGO-MOORHEAD REDHAWKS—Released INF Kory Wayment.

WINNIPEG GOLDEYES—Announced the retirement of RHP Greg Dupas.

BASKETBALL

National Basketball Association

HOUSTON ROCKETS—Exercised their option on the contract of F Steve Novak.

WASHINGTON WIZARDS—Re-signed F Antawn Jamison to a four-year contract.

FOOTBALL

National Football League

TENNESSEE TITANS—Signed OT David Stewart to a multiyear contract extension.

Canadian Football League

WINNIPEG BLUE BOMBERS—Signed OL Darryl Conrad to their practice roster. Released DB Sam Young.

HOCKEY

National Hockey League

COLORADO AVALANCHE—Re-signed D Adam Foote to a two-year contract and D John-Michael Liles to a four-year contract.

PHILADELPHIA FLYERS—Traded LW Kyle Greentree to Calgary for D Tim Ramholt.

SAN JOSE SHARKS—Re-signed F Jody Shelley to a two-year contract.

TAMPA BAY LIGHTNING—Signed LW Gary Roberts to a one-year contract and F Vinny Prospal to a multiyear contract. Acquired D Janne Niskala from Philadelphia for a 2009 sixth-round draft pick.

American Hockey League

BINGHAMTON SENATORS—Signed RW Jeremy Yablonski to a two-year contract.

SPRINGFIELD FALCONS—Named Gerry Fleming assistant coach.

ECHL

CHARLOTTE CHECKERS—Agreed to terms with D Kenny Smith.

LACROSSE

National Lacrosse League

NEW YORK TITANS—Named Ed Comeau coach.

SOCCER

Major League Soccer

D.C. UNITED—Acquired M Craig Thompson from the Houston Dynamo for a 2010 fourth-round supplemental draft pick.

United Soccer League

MONTREAL IMPACT—Traded F Charles Gbeke to Vancouver for MF Tony Donatelli and cash.

COLLEGE

ALCORN STATE—Named Tonya Edwards women's basketball coach.

BROWN—Named Michael Hughes men's golf coach.

GEORGIA TECH—Suspended redshirt freshman CB Jerrard Tarrant from the football team.

OHIO STATE—Named Meredith Hoover women's assistant gymnastics coach.

PENNSYLVANIA—Announced the resignation of Francis Vaughn, golf director.

PROVIDENCE—Named Cary Collins coordinator of basketball operations.