Updated

Oct. 6 — Playoffs begin.

Oct. 27 — World Series begins, city of National League champion.

November — Free agent period to sign exclusively with former teams, first five days after World Series ends.

Nov. 16-17 — General managers' meetings, Orlando, Fla.

Nov. 17-18 — Owners' meetings, Orlando, Fla.

Nov. 23 — Last day for teams to offer salary arbitration to their former players who became free agents.

Nov. 30 — Last day for free agents offered salary arbitration to accept the offers.

Dec. 1 — Last day for teams to offer 2011 contracts to unsigned players.

Dec. 6-9 — Winter meetings, Lake Buena Vista, Fla.

Jan 5-15 — Salary arbitration filing.

Jan. 18 — Exchange of salary arbitration figures.

Feb. 1-21 — Salary arbitration hearings.

Feb. 13 — Voluntary reporting date for pitchers, catchers and injured players.

Feb. 18 — Voluntary reporting date for other players.

March 1 — Mandatory reporting date.

March 2-11 — Teams may renew contracts of unsigned players.

March 14 — Last day to place a player on unconditional release waivers and pay 30 days termination pay instead of 45 days.

March 28 — Last day to request unconditional release waivers on a player without having to pay his full 2011 salary.

March 30 — Opening day, active rosters reduced to 25 players.

July 12 — All-Star game, Phoenix.

July 31 — Last day to trade a player without securing waivers.

Aug. 15 — Last day to sign selections from 2011 amateur draft who have not exhausted college eligibility.

Sept. 1 — Active rosters expand to 40 players.

Sept. 30 or Oct. 1 — Playoffs begin.

Oct. 19 — World Series begins.

November — Free agent period to sign exclusively with former teams, first five days after World Series ends.

Nov. 23 — Last day for teams to offer salary arbitration to their former players who became free agents.

Nov. 30 — Last day for free agents offered salary arbitration to accept the offers.

Dec. 5-8 — Winter meetings, Dallas.

Dec. 2 — Last day for teams to offer 2012 contracts to unsigned players.

Dec. 11 — Collective bargaining agreement expires.