New York Islanders -- Traded C Dave Simpson to the Pittsburgh Penguins for future considerations.New York Rangers -- Signed C Raimo Helminen, a Finn, and D Kjell Samuelsson, a Swede. FOOTBALL

Buffalo Bills -- Waived QB Joe Dufek; signed QB Bruce Mathison.Chicago Bears -- Placed veteran LB Brian Cabral (knee) on injured reserve; re-signed LB Jim Morrissey.Denver Broncos -- Signed LB/DE Karl Mecklenburg to a series of one-year contracts.New York Jets -- Signed holdouts T Marvin Powell and G Reggie McElroy.Pittsburgh Steelers -- QB Mark Malone was named AFC offensive player of the week.San Diego Chargers -- K Rolf Benirschke's pulled groin muscle could keep him out for four weeks. BASEBALL

Milwaukee Brewers -- Said RHP Pete Vuckovich will undergo surgery this week on his right shoulder; recalled RHP Pete Ladd from AAA Vancouver. BASKETBALL

Los Angeles Lakers -- Signed 7-foot-5 C Chuck Nevitt to a one-year contract. $ AUTO RACING

Dale Inman, the crew chief for stock car driver Terry Labonte who was planning to rejoin Richard Petty for the 1986 season, has been dismissed early by Labonte's team owner, Billy Hagan. COLLEGES

Iowa Wesleyan -- Recruit Larry Mee, and his mother, were killed when their car collided with a truck in Olds, Iowa.