BASEBALL American League
* BALTIMORE ORIOLES -- Named Rick Dempsey organizational instructor.
* BOSTON RED SOX -- Signed Bob Geren, catcher, to a minor league contract.
* OAKLAND ATHLETICS -- Placed Terry Steinbach, catcher, on the 15-day disabled list retroactive to April 10. Recalled Henry Mercedes, catcher, from Tacoma of the Pacific Coast League.
* SEATTLE MARINERS -- Activated Matt Sinatro, catcher, from the 15-day disabled list. Recalled Jeff Nelson, pitcher, from Calgary of the Pacific Coast League. Sent Kevin Brown, pitcher, and Patrick Lennon, outfielder, to Calgary.
* TEXAS RANGERS -- Recalled Barry Manuel, pitcher, from Oklahoma City of the American Association.
* CINCINNATI REDS -- Placed Hal Morris, first baseman, on the 15-day disabled list. Activated Rob Dibble, pitcher, from the 15-day disabled list.
BASKETBALL National Basketball League
* INDIANA PACERS -- Placed Rik Smits, center, on the injured list. Activated Sean Green, center, from the injured list.
FOOTBALL National Football League
* NEW YORK JETS -- Re-signed Raul Allegre, kicker.
* HOLLYWOOD PARK -- Named Rick Simon, assistant director of publicity, director of publicity. Named Mike Mooney assistant director of publicity.
* DENVER -- Named Kurt Smitz men's and women's ski coach.
* EAST TENNESSEE STATE -- Extended the contract of Alan LeForce, men's basketball coach, through 1995.