Los Angeles Dodgers pitcher Fernando Valenzuela, who filed for arbitration last week, has agreed to terms for the upcoming season, the team and Valenzuela's agent announced jointly.

Valenzuela will earn $1.2 million this season, the agent announced. Valenzuela had submitted $1.3 million as his arbitration figure and the National League club had filed a $1.1-million bid, the salary Valenzuela earned in 1984, when he had a 12-17 record . . .

San Francisco Giants General Manager Tom Haller said a proposed deal that would send outfielder Jack Clark to the St. Louis Cardinals in a six-player trade might have run into a new snag.

Clark underwent a two-hour examination of his injured knee by Giants team physicians Fred Behling and Gordon Campbell Monday and reported he was fit to be traded.

However, Haller said, "A couple of things have cropped up contractually. We are saying what we have said all along: as of right now we have no trade" . . .

Representatives of major league owners and players have reached tentative agreement on the issuue of mandatory drug-testing clauses in players' contracts.

Don Fehr, head of the players' union, said, "Though we don't know for certain, it's possible we have an agreement."

The dispute arose when the Los Angeles Dodgers included a clause in the contract of first baseman/outfielder Mike Marshall that mandated tests for illegal drug use.

Fehr said that, as a result of the meeting, there will be no further attempts to include the tests in contracts.