Ken Riley ran 56 yards for a touchdown with the first of his three interceptions and Ken Anderson accounted for two more touchdowns today to enable the Cincinnati Bengals to beat the previously undefeated Los Angeles Raiders, 31-17.

It was Cincinnati's first victory over a Raiders team since 1975, and left both clubs with 3-1 records. "Our defense was outstanding," Bengals' Coach Forrest Gregg said. "We concentrated on their running game and did a good job shutting them off."

The game was played on rain-slicked artificial turf, which contributed to the Bengals' second touchdown. Raiders quarterback Jim Plunkett threw a sideline pass for Marcus Allen, but the running back slipped down and Riley had a clear path to the end zone with his 53rd career interception.

Riley helped the Bengals to a 14-0 first-quarter lead with his touchdown, then his two later interceptions helped stifle the Raiders' offense.

Bengals fullback Pete Johnson gained 129 yards in 23 carries and scored a one-yard touchdown. Anderson threw a three-yard touchdown pass to rookie Rodney Holman and later scrambled 10 yards for another score. Jim Breech kicked a 35-yard field goal to complete Cincinnati's scoring.

The Raiders never led, but trailed only 21-17 midway through the third quarter. They got touchdowns on Plunkett's passes of 34 and 28 yards to Cliff Branch and three points on Chris Bahr's 31-yard field goal.

The game was Cincinnati's first at home since the strike and fans showed fairly strong support for the Bengals. There were 59,446 tickets sold and 53,330 fans attended.