Detroit Lions star running back Billy Sims may not report to the NFL club's training camp tonight along with other veterans, Coach Monte Clark says. Sims has claimed he is in the third year of a three-year contract without an option. But Lions General Manager Russ Thomas said Sims' contract calls for an option year. Thomas said the Lions made a written offer to Sims and his agent, Jerry Argovitz, to extend Sims' contract before July 15, the date the basic agreement expired between the league owners and the NFL Players Association . . .

Free safety Ken Greene, the St. Louis Cardinals' only unsigned player, says he will not report to training camp Friday with the rest of the veterans. "I really want to get traded," Greene said . . .

The annual welcome home luncheon for the Redskins will be held Thursday, Aug. 26 at the Sheraton Washington Hotel beginning at noon. Redskin Alumni President Jim Ricca said the luncheon offers the fans a look at new players and some old favorites. Owner Jack Kent Cooke and Coach Joe Gibbs are scheduled to speak . . .

The city of Oakland's request to block the move of the Raiders football team to Los Angeles was once again rejected by the California Supreme Court. In a brief order, the court denied the city's petition for a stay or injunctive relief. Oakland had urged the high court to block the National Football League team's move until its eminent domain action to acquire the team is completed.