ROCKVILLE, Md. (AP) _ Baltimore Orioles owner Edward Bennett Williams left the bulk of his estate, worth an estimated $70 million, to his widow, said the attorney who drafted Williams' will.

Despite a newspaper's report to the contrary, attorney Sheldon S. Cohen said he believes Agnes Williams probably will sell the franchise.

''First, we have to see what people will offer us for it. She can choose to sell if she wants, or she can choose not to ... All things being equal, I think she will,'' Cohen said.

However, the Washington Post today reported sources close to the team as saying they believe Mrs. Williams is considering retaining majority interest in the Orioles.

Cohen said it may be several weeks before Mrs. Williams makes a decision.

Williams, 68, died Saturday after an 11-year bout with cancer. His will was filed Thursday in Montgomery County Circuit Court.

Although his wife was the chief beneficiary of the estate, Williams also left $2 million to Holy Cross College in Worcester, Mass., from which he graduated in 1941, $2 million to Georgetown University, where he attended law school, and $1 million to the Archdiocese of Washington.

He also left $1 million to each of his seven children, and smaller sums to his secretary, a former sister-in-law and his personal driver.