Transactions

BASEBALL

American League

DETROIT TIGERS—Placed LHP Dontrelle Willis on the 15-day DL. Recalled OF Ryan Raburn from Toledo (IL).

TAMPA BAY RAYS—Transferred RHP Chad Orvella from the 15-day to the 60-day DL.

TEXAS RANGERS—Placed LHP Eddie Guardado on the 15-day DL, retroactive to April 5. Activated RHP Luis Mendoza from the 15-day DL.

National League

ATLANTA BRAVES—Released INF Scott Spiezio from his minor league contract.

HOUSTON ASTROS—Purchased the contract of INF David Newhan from Round Rock (PCL).

SAN FRANCISCO GIANTS—Recalled OF John Bowker from Fresno (PCL). Optioned OF Clay Timpner to Fresno.

WASHINGTON NATIONALS—Optioned RHP Jason Bergmann to Columbus (IL). Activated RHP Chad Cordero from the 15-day DL.

HOCKEY

National Hockey League

EDMONTON OILERS—Signed F Robert Nilsson to a three-year contract

OTTAWA SENATORS—Recalled C Alexander Nikulin from Binghamton (AHL).

COLLEGE

LOUISIANA TECH—Named Teresa Weatherspoon associate women's basketball coach.