Edward (Buddy) LeRoux and two limited partners struck out yesterday in their attempt to take control of the Boston Red Sox.

In a 113-page decision, Suffolk Superior Court Judge James P. Lynch Jr. ruled in Boston that Haywood C. Sullivan and Jean R. Yawkey, two of the American League club's general partners, were correct in their contention that LeRoux, the third general partner, had no right to assert his control of the club on June 6.

However, Lynch rejected the Sullivan-Yawkey argument in the complex case that LeRoux's move permitted them to buy LeRoux and his group out.

LeRoux had tried to amend the club's general partnership agreement. He said he and Kentucky coal investor J. Rogers Badgett, a prominent limited partner of the club, had rounded up enough limited partnerships to put LeRoux in charge rather than Sullivan, who is the team's general manager.

The Sullivan-Yawkey forces then sued to block the move . . .

Lawyer Roy Cohn has agreed to represent New York Yankees Manager Billy Martin at his appeal of a two-game suspension levied by American League President Lee MacPhail.

Cohn, who was counsel to Joseph McCarthy during the senator's hearings in the 1950s, said in a press release distributed by the Yankees that he decided to handle the appeal after viewing films of the game and speaking with witnesses.