Baseball ’90 PREVIEW : KEY DATES

April 9: Opening day.

May 1: Clubs may resume negotiations with their former players who became free agents.

May 15: Clubs may re-sign players whom they released following the end of the 1989 season.

June 4: Amateur draft, through June 6.

July 10: All-Star Game, Wrigley Field, Chicago, 6:35 p.m.

Aug. 5: Hall of Fame induction ceremonies, Cooperstown, N.Y.

Aug. 6: Hall of Fame game, Montreal vs. Baltimore, Cooperstown, N.Y.

Aug. 31: Deadline for postseason rosters.

Sept. 1: Active rosters increased to 40 players.

Oct. 1: All players an optional assignment must be recalled.

Oct. 4: National League playoffs begin, city of West division winner.

Oct. 6: American League playoffs begin, city of East division winner.

Oct. 16: World Series begins, city of National League champion.

Nov. 30: Winter meetings, Los Angeles, through Dec. 6.