July 27 — Hall of Fame inductions, Cooperstown, N.Y. July 28 — Deadline for drafted players to sign, except for players who have exhausted college eligibility, 5 p.m. EDT July 31 — Last day during the season to trade a player, 6 p.m. EDT Aug. 2 — Atlanta vs. Cincinnati, Bristol, Tenn. Aug. 17 — New York Mets vs. Seattle at Williamsport, Pa. Aug. 31 — Last day to be in organization to be postseason eligible. Sept. 1 — Active rosters expand to 28 players. Sept. 28 — Regular season ends.