Detroit Lions -- Signed rookie CB John Bostic; cut CB Clarence Chapman. Green Bay Packers -- Signed ex-Seattle QB Jim Zorn; released rookie Joe Shield. Miami Dolphins -- Signed ex-Dolphin WR Duriel Harris; released WR Frank Lockett. Waived QB Bryan Clark, LB Darryl Hunt off IR. New Orleans Saints -- Recalled OL veterans Pete Perot and David Carter, replacing G Kelvin Clark (broken ankle) and G Brad Edelman (knee), starters injured Sunday vs. Tampa Bay. BASEBALL

Chicago Cubs -- Will activate RHP Rick Sutcliffe to start Friday against Philadelphia. He last pitched July 28. Championship Series -- NBC-TV assigned announcers Vin Scully and Joe Garagiola to the NL playoffs, Bob Costas and Tony Kubek to the AL. OLYMPICS

Seoul 1988 Games -- All three major U.S. television networks submitted revised bids for coverage, the International Olympic Committee announced. BASKETBALL

Dallas Mavericks -- Signed F-G Detlef Schrempf, No. 1 draftee, for four years. New York Knicks -- Signed G Trent Tucker to a multiyear renewal. COLLEGES

Georgia -- Hired Nate (Tiny) Archibald as a basketball assistant. De Paul -- Sophomore basketball G Randy Pettus, projected as a 1985-86 starter, left the team. Oklahoma -- Declared ineligible freshman Kelly Garrison, No. 2 among U.S. women gymnasts, after consultation with an NCAA committee. No reason announced; appeal likely. JURISPRUDENCE

USFL Players Assocation -- Filed a federal suit demanding $1.2 million in back pay owed 48 members of the Portland Breakers, as determined at arbitration July 20. The team failed to meet its July payroll and lost all its players in August. New York -- Ex-major league baseball player Joe Pepitone asked a judge to bar the press from an Oct. 3 hearing on his motion for dismissal of drug charges. Judge Luigi Marano reserved decision. HOCKEY

Montreal Canadiens -- Former star Guy Lafleur, who retired as an active player last November, resigned his public relations post with the club in a dispute over salary and is contemplating a comeback for the ($400,000) year left on a five-year playing contract.