POSTSEASON ROSTERS SET AT MIDNITE ET

Tomorrow is September 1st, which means major league teams increase their active rosters from 25 men to 40, a process known as September callups. But anyone not on the 25-man roster as of midnite tonight will not be eligible for post-season play. This signals the end of the waiver trade period, which, with still a few hours to go, has been one for the ages this season.

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