Walter Payton rushed for 111 yards and two first-half touchdowns and Chicago's defense forced five turnovers and made nine sacks to take the Bears to a 17-6 victory today over the Los Angeles Raiders.

Payton, running for 100 yards for the 61st game of his career, scored on an 18-yard run in the first quarter and an eight-yard run in the second quarter, giving Chicago (7-3) a 14-0 lead. He carried 27 times.

Chicago quarterback Jim McMahon had to leave the game early in the second half due to a bruised kidney. He was hospitalized, in fair condition, for tests and observation. He was replaced by Steve Fuller.

The Raiders (7-3), defending Super Bowl champions, have lost two games in a row for the first time since the end of the 1981 season. The last team to hold the Raiders without a touchdown was Kansas City, on Oct. 11, 1981.

The Raiders, losing two quarterbacks due to injuries, managed only two field goals by Chris Bahr; a 44-yarder on their last possession of the first half and a 40-yarder on their first possession of the second half.

Marc Wilson started at quarterback but came out in the first quarter. He returned in the second quarter, with his passing thumb bandaged, after David Humm was sacked and injured a knee.

Chicago's defense, ranked first in the NFL, had nine sacks for losses of 58 yards, recovered two fumbles and made three interceptions. Chicago had 11 sacks in its victory over Minnesota last week.

Payton's second touchdown was set up when Leslie Frazier intercepted Wilson's pass and returned 33 yards to the Raiders' 11.

The Raiders' final fumble came with 4:28 left and halted a drive that had started at the their six-yard line and reached the Bears' 16. Richard Dent, who had 4 1/2 sacks in the game, tackled Wilson and recovered the ball at the 23.

Although many of the Raiders expressed outrage over the Bears' "cheap" play, defensive end Lyle Alzado said simply, "They were playing like us."

Bears linebacker Otis Wilson, who last weekend knocked out Vikings quarterback Archie Manning, was responsible for both Marc Wilson's and Humm's injuries. He also chopped down running back Marcus Allen at the knees from behind.

"Wasn't from behind," Wilson said. "It was from the front."

When told TV replays indicated otherwise, Wilson said, "Oh, well, I had my eyes closed, anyway."