Cleveland Cavaliers -- Signed three free agents: G Johnny Davis, F Edgar Jones and F Mark West; extended contract of C Roy Hinson; no terms disclosed.

Dallas Mavericks -- Traded F Anthony Teachey to the Seattle SuperSonics for a second-round draft choice in 1989.

Houston Rockets -- Signed No. 1 draft choice G Steve Harris and G Lewis Lloyd to four-year contracts.

Los Angeles Clippers -- Signed F Jamaal Wilkes, 11-year veteran free agent.

Phoenix Suns -- Signed Georgi Glouchkov, a 6-foot-8 F from Bulgaria. The contract is subject to approval by the Bulgarian Basketball Federation and the International Federation of Amateur Basketball. Under NBA rules, all players in training camp must be under contract. There had been concern that by signing Glouchkov, the Suns would jeopardize the Bulgarian's amateur standing.

Portland Trail Blazers -- Signed first-round draft pick Terry Porter, a 6-4 G from Wisconsin-Stevens Point to a multiyear contract; F Ben Coleman, a rookie from Maryland whose rights were obtained in a draft-day trade with the Chicago Bulls, has not signed and will miss the start of camp. FOOTBALL

St. Louis Cardinals -- If the city's baseball team makes it to the playoffs, the football Cardinals will switch their Oct. 13 scheduled home game against the Philadelphia Eagles from Busch Stadium, flip-flopping with a Nov. 17 game now scheduled in Philadelphia.

San Francisco 49ers -- Placed NT Michael Carter on injured reserve (hamstring); signed NT Scott Garnett, who played for the Denver Broncos in 1984. HOCKEY

Pittsburgh Penguins -- Sent 11 players, including veteran C Mitch Lamoureux and LWs Bob Errey and Gary Rissling, to their Baltimore farm club. JURISPRUDENCE

Toledo, Ohio -- Leon Bonner, 45, of Liberty Center, one of 14 men charged in alleged harness race-fixing in the Midwest and Canada, pleaded no contest to a felony charge of conspiring to attempt to commit bribery in a sporting event. Two other charges, one alleging Bonner aided a conspiracy and the other that he lied before a federal grand jury, are to be dimissed when he is sentenced, said James Jensen, assistant U.S. attorney. LOCAL

Maryland -- Mal Malette and other Maryland alumni who are former pro baseball players will participate in four-hour seminar open to public that is sponsored by Society of American Baseball Research at 1 p.m. today at the Francis Scott Key building. OBITUARY

Bill Banker, an all-America RB at Tulane in the 1920s who was known as the "Blond Blizzard," died at 78 in New Orleans.