ostponed noon luncheon today because of NFL players strike. Luncheon, which was to have saluted new Washington Redskins' players, will be rescheduled when the strike is resolved. HOCKEY

St. Louis Blues--Signed free agent F Curt Brackenbury (11 goals, 29 assists for the Edmonton Oilers last season); assigned G Rich Sirois, D Real Paiement, F Dale Yawichuk, F Dan Pupillo, G Bart Hunter and D Bruce McKay to Milwuakee, IL. AUTO RACING

Old Dominion 500--Has been rescheduled for Oct. 17 at 12:30 p.m. after rain forced postponement Sunday. The 31-car starting field will remain intact.

National Broadcasting Company--Announced it will continue to telecast the annual Caesars Palace Grand Prix through 1984. The race was the season-finale in 1981 and 1982 and decided the world champion both years. TRACK

Greek National Championships--Sophia Sakorafa of Greece set a world record at Canea, Crete, in the women's javelin with a throw of 243 feet 5 1/4 inches, bettering the record of 237-6 1/2 held by Tina Lillak of Finland. RUNNING

Severn River 15 Kilometer--At Annapolis, Lt. Tom Kelley, 29, won the men's division in 46:09; Lt. Jean Labuti, 31, finished in 53:46 to lead the women.