As of yesterday's final home game, the Cubs have won 99 games and lost 56—the best record in baseball this year—including 57 games at Wrigley, which tied the team record set in 1933 and 1935.
There are six games left in the season, so the Cubs won't pass 107 games (last reached in 1907) or their team-record 116 wins (set in 1906). But who cares? The only record that most of us Cubs fans want to see broken is the one for most World Series won in a season, which currently stands at 1 (last set in 1908).
The first playoff game is Friday October 7th at Wrigley, against whoever wins the NL Wild Card.