Foot surgery scheduled today could keep Bill Walton of the Boston Celtics out most of next NBA season, but he hopes he won't miss all of it and then can play several more years.

The 6-foot-11 Walton is to have surgery in California on his right foot and ankle to relieve the pressure that has caused stress fractures.

Walton, who turns 35 Nov. 5, said he made up his mind to have the surgery after a number of medical consultations.

"There's no other way around it," he told the Boston Herald. "The structure of the foot has to be changed. They have to relieve the stress by taking out sections of bone . . .

"But basketball's still a big part of my life. It's what I want to do, and I'm going to do everything it takes to get back. I want to play as long as I can. I don't want to retire." . . .

The Portland Trail Blazers, burned in the past by leg and foot troubles (Walton, Sam Bowie, et al.), have taken team physician Robert Cook's advice after his examination of Keith Lee and moved to call off their draft day trade of guard Jim Paxson to the Cleveland Cavaliers for the former Memphis State big man. Although Lee hasn't missed any playing time, Cook saw "a high risk" that Lee would suffer serious knee problems down the NBA road . . .

Jarrod Mustaf, a 6-foot-7 forward from DeMatha, had 29 points and 15 rebounds, Clinton Venable 22 points and 13 rebounds, Byron Hawkins 21 points and Aaron McMurray 20 as Potomac Valley beat Missouri Valley, 123-105, in the opening round of the AAU junior championships in Jacksonville.