Baseball

Orioles -- Released P Todd Frohwirth. Sent P John O'Donoghue and OF Sherman Obando to Triple-A Rochester and OF Alex Ochoa to Double-A Bowie.

Boston Red Sox -- Sent P Tim Vanegmond and OF Matt Stairs to Triple-A Pawtucket and C Scott Hatteberg to Double-A New Britain. Sent P Gar Finnvold, P Joe Caruso, OF Paul Thoutsis and 1B Mike Twardoski to minor-league camp for reassignment.

California Angels -- Signed P Mark Leiter. Assigned P Shawn Hillegas and P John Farrell to minor-league camp.

Chicago Cubs -- Optioned P Larry Luebbers, P Rafael Novoa, IF Matt Franco, IF Tommy Shields and OF Ozzie Timmons to Triple-A Iowa. Optioned OF Doug Glanville to Double-A Orlando. Returned P Bill Brennan, P Terry Bross, C George Pedre, IF Cris Colon, IF Todd Haney and IF Eric Yelding to minor-league camp for reassignment.

Los Angeles Dodgers -- Sent P Greg Hansell, P Omar Daal and P John DeSilva to Triple-A Albuquerque.

New York Yankees -- Sent P James Austin to minor-league camp for reassignment.

Oakland Athletics -- Sent down P Miguel Jimenez, P Mark Acre, P Carlos Maldonado, P Roger Smithberg, IF Fausto Cruz, OF Kerwin Moore, OF Jose Herrera and C Henry Mercedes.

Philadelphia Phillies -- Sent P Bob Wells and P Andy Carter to minor-league camp for reassignment.

Toronto Blue Jays -- Sent OF Rick Holifield and IF Tilson Brito to Double-A Knoxville. Sent OF Shawn Green, IF Howard Battle and P Aaron Small to Triple-A Syracuse. Sent C Angel Martinez to Single-A Dunedin.

Basketball

Los Angeles Clippers -- Activated F Loy Vaught from the injured list. Placed F Tom Tolbert on the injured list.

Football

Tampa Bay Buccaneers -- Agreed to a three-year deal LB Lonnie Marts.

Hockey

Buffalo Sabres -- Recalled LW Sergei Petrenko from AHL Rochester.

New York Rangers -- G Corey Hirsch notified the club that he has changed his mind and agreed to report to AHL Binghamton.

San Jose Sharks -- Traded D Doug Zmolek and D Mike Lalor to the Dallas Stars for RW Ulf Dahlen and future considerations.