Fred O'Connor, former offensive coordinator and interim head coach of the San Francisco 49ers, was named offensive backfield coach of the Redskins yesterday by Coach Jack Pardee.

Pardee said Joe Walton will continue as offensive coordinator. George Dickson, who coached the offensive backs last season, will handle the linebackers, which he did at San Diego before coming here.

Pardee coached the Redskins' linebackers last season. He said, "We were short staffed and the acquisition of O'Connor will help us all to do a better job. Fred is familiar with me."

O'Connor was offensive backfield coach with the Florida Blazers of the World Football League when Pardee was head coach there.

Because Walton had played, scouted and coached for the New York Giants, there have been reports that the Giants might be interested in him as head coach. But Pardee, asked if the Giants had asked permission to talk to Walton about the job, said they had not.

O'Connor began his pro coaching career under Pardee in the WFL. When Pardee became head coach of the Chicago Bears, O'Connor was hired as offensive backfield coach of the Bears.

When Pardee became head coach of the Redskins last season, O'Connor joined the 49ers as offensive coordinator.After the 49ers dropped Pete McCulley as head coach, O'Connor served as head coach the last seven games.

O'Connor, an assistant coach under Roy Lester at Maryland in 1971, said yesterday he was delighted to be back in Washington "and to be reunited with Jack Pardee."

He also insisted he would have no difficulty adjusting from being a head coach to working under Walton.

Before joining the pros, O'Connor was on the staffs of Villanova, Southern Mississippi, C. W. Post and Maryland, where he handled the quarterbacks and receivers. He is a native of Brooklyn who was a quarterback and running back at East Stroudsburg (Pa.) State.

McCulley, who coached the Baltimore Colts' and Redskins' receivers before being named coach of the 49ers, was fired after nine games.He was hired yesterday as receivers coach of the New York Jets to replace Dan Henning, now with the Miami Dolphins.