The San Diego Chargers have signed quarterback Babe Laufenberg to serve as a backup to Mark Herrmann following the loss of Dan Fouts. Laufenberg, a sixth-round draft choice by Washington in 1983, was released by the Redskins just before the start of this season.

Fouts, who is expected to be sidelined for three to six weeks with torn ligaments in his right knee, was injured Sunday during the Chargers' second offensive series against the Cleveland Browns. He underwent arthroscopic examination and will be fitted with a knee brace.

Laufenberg spent the 1984 season on injured reserve with a shoulder injury and did not see action during the 1983 regular season. During his senior year at Indiana, Laufenberg set a school record for passing yards in a season with 2,468.

The Chargers also signed former USFL running back/receiver Gary Anderson to a series of four one-year contracts.

*Eagles: Another holdout problem was solved by the trade of linebacker Jerry Robinson to the Los Angeles Raiders for a second-round draft choice in 1986.

Robinson finally reported to the Eagles last week but indicated he still wanted to be traded. He had not reported to preseason training in an attempt to get his contract renegotiated, but the Eagles refused.

Robinson, 6 feet 2 and 225 pounds, was the Eagles' first-round draft pick in 1979 and led the team in tackles last season with 143.

The draft choice the Eagles obtained from the Raiders was the one Los Angeles got from the Washington Redskins last month in a trade for wide receiver Malcolm Barnwell.

The Eagles last week traded defensive end Dennis Harrison, one day after he ended a holdout, to the Los Angeles Rams for two draft picks.

*Bears: Defensive end Richard Dent injected a sour note into the Chicago euphoria over a 4-0 record and the rout of the Washington Redskins, indicating he might want to be traded unless given a new contract. Dent led the league with 17 1/2 sacks last year, helping the Bears to an NFL-record 72.

"I wanted to get it done as soon as possible," Dent said of the negotiations, which began in February. "With the two weeks before the trading deadline, if we can't get anything done maybe I'll play for someone else."

*49ers: San Francisco, 18-1 in winning the Super Bowl last season, is 2-2 after Sunday's loss to New Orleans and two games behind the Los Angeles Rams in the NFC West, But, Coach Bill Walsh says, "We don't want to look at this as a crisis level."

San Francisco's 81 net passing yards against the Saints was its lowest total since Walsh became coach six years ago.

*Patriots: Running back Craig James criticized the team's coaching staff following Sunday's 35-20 loss to the Los Angeles Raiders.

"I don't know if the Raiders were trying to take me out of our offense or not, but it didn't matter what they did. We took me out of our game plan," said James, who has scored two of New England's nine touchdowns this season and also thrown a touchdown pass ". . . They keep saying we have so many weapons on offense, but we're trying to use so many weapons that we're not using any of them."

New England gained just 97 yards on 32 runs. James rushed 12 times for 49 yards.

*Falcons: Coach Dan Henning of struggling Atlanta said wide receiver Charlie Brown will miss next Sunday's date with the San Francisco 49ers and quarterback Steve Bartkowski has a bruised thigh that leaves his status in doubt.

Henning said Bartkowski isn't expected to practice early in the week and if he can't practice all week, backup David Archer might start against the 49ers. Henning said that with a spot open on the roster, he would bring back Bob Holly, an ex-Redskin cut in the preseason, as an emergency backup quarterback.