The Series will start on Oct. 23 and Game 7 would be on Oct. 31, Major League Baseball announced Monday. Last year, NL Division Series had the extra off day. In the best-of-five Division Series, the top seed plays the 4-vs.-5 winner and the No. AL and NL Division Series will start Oct. 3. The National League Championship Series starts Oct. 11 and the American League Championship Series the following day.