* BALTIMORE ORIOLES -- Signed Jeffrey Hammonds, outfielder.
* CHICAGO WHITE SOX -- Purchased the contract of Nelson Santovenia, catcher, from Vancouver of the Pacific Coast League. Optioned Brian Drahman, pitcher, to Vancouver.
* DETROIT TIGERS -- Activated Rob Deer, outfielder, from the disabled list. Optioned Phil Clark, outfielder, to Toledo of the International League.
* TORONTO BLUE JAYS -- Optioned Bob MacDonald, pitcher, to Syracuse of the International League.
* CHICAGO CUBS -- Activated Ken Patterson, pitcher, from the disabled list. Placed Dennis Rasmussen, pitcher, on the 15-day disabled list, retroactive to June 28.
* ST. LOUIS CARDINALS -- Optioned Brian Jordan, outfielder, to Louisville of the American Association.
* SAN DIEGO PADRES -- Activated Benito Santiago, catcher, from the disabled list. Placed Dann Bilardello, catcher, on the 15-day disabled list.
National Basketball Association
* INDIANA PACERS -- Signed Micheal Williams, guard, to a multiyear contract.