Baltimore Orioles -- Activated P Ben McDonald from 15-day DL. Optioned P Jose Mesa (4-8, 5.75 ERA) to Class AAA Rochester.
Cleveland Indians -- Recalled 1B Reggie Jefferson from Class AA Canton-Akron.
Minnesota Twins -- Placed OF Dan Gladden on the 15-day disabled list. Recalled 1B Paul Sorrento from Class AAA Portland.
Montreal Expos -- Optioned P Bill Sampen (5-2, 4.71) to Class AAA Indianapolis. Recalled P Steve Frey from Indianapolis.
Oakland Athletics -- Optioned P Johnny Guzman (2-3, 3.55) to Class AAA Tacoma. Recalled IF Scott Hemond from Tacoma.
San Diego Padres -- Activated P Ed Whitson from 15-day disabled list. Optioned P Tim Scott to Class AAA Las Vegas.
Boston Celtics -- Signed F Rick Fox to a multi-year contract.
Chicago Blackhawks -- Signed free-agent LW John Tonelli (14 goals, 16 assists for Los Angeles Kings).