The Los Angeles Rams placed disgruntled running back Eric Dickerson on the inactive list yesterday and announced he would not play this week against the San Francisco 49ers.

Dickerson, who said he wants to be traded as a result of the Rams' refusal to meet his contract demands, sat out the second half of Monday night's game against Cleveland, claiming he was suffering from a charley horse. He carried seven times for 38 yards in the 30-17 loss.

"At this time, Eric is physically and mentally unable to play and is out of {Sunday's} game," Los Angeles Coach John Robinson said. "He will be placed on the inactive list. Eric will be reinstated on the active roster when he is 100 percent physically and mentally able to play."

Robinson added the club is not "comtemplating any other action," but there have been reports of trade talks with Denver, Indianapolis and Tampa Bay.

Dickerson, 26, left camp before the announcement and was not immediately available for comment . . .

William Bidwill, owner of the St. Louis Cardinals, rejected the latest proposal to build a new stadium for his NFL team, and a source told the Associated Press that St. Louis County Executive Gene McNary believes the franchise will move. (Maryland Stadium Authority officials met with Bidwell Tuesday during the NFL meetings.)

Bidwill informed McNary through a letter written to two local business leaders that a plan to build an open-air stadium for the team was unacceptable. McNary had proposed a domed stadium for the team, but that plan fell through.

"It's over," the source quoted McNary as saying. "There's no point in carrying it any further."

Herbert Belgrad, chairman of the Maryland Stadium Authority and head of the official Maryland effort to bring back an NFL team to the city, said on WBAL-TV the rejection appeared to give Baltimore a green light to talk to Bidwill . . .

Wayne Fontes will remain with the Detroit Lions as defensive coordinator while awaiting preliminary examination on drunken driving and cocaine possession charges, the NFL club says.

Fontes, arrested Oct. 21 after his car was found in a ditch near his home in Rochester Hills, Mich., told investigators that a phantom was driving the car, according to Oakland County police.