ARENAS

Madison Square Garden -- Announced David (Sonny) Werblin will give up his duties as MSG chairman and become a consultant to the sports and entertainment complex. John Krumpe, MSG's president and chief executive officer, will take over the day-to-day responsibilities as chairman. BASEBALL

American League -- Named as player of the week rookie OF Oddibe McDowell, the first AL player this season and the first Texas Ranger ever to hit for the cycle. The former U.S. Olympian went 13 for 27, including eight consecutive hits over two days, in batting .481.

Sporting News -- Selected OF Jose Cruz of the Houston Astros and P Joaquin Andujar of the St. Louis Cardinals this year's top Latin American major leaguers. BOXING

World Boxing Association -- Barry McGuigan will make the first defense of his featherweight title Sept. 28 against the No. 1 contender, Bernard Taylor of Knoxville, Tenn., either in London or the English Midlands city of Birmingham, according to promoter Stephen Eastwood; announced middleweight champion Marvelous Marvin Hagler will be stripped of his title if he fights John Mugabi Nov. 14 as scheduled instead of No. 1 contender James Shuler, who is to meet World Boxing Council super welterweight champion Thomas Hearns on the same card. FOOTBALL

Tampa Bay Bandits (USFL) -- A group of investors put down enough money to keep the franchise alive. Architect Lee Scarfone, a Bandits limited partner for three years, is head of the group that deposited between $250,000 and $300,000 in a bank, meaning players will receive back pay for their final game of the 1985 season. HOCKEY

Minnesota North Stars -- Signed C Keith Acton to a three-year contract and LW Tim Coulis, a former Washington Capital, to a two-year contract.