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.