The Cubs and Pirates played to an actual tie:

The Chicago Cubs and Pittsburgh Pirates played to the first tie game in the major leagues since 2005 when rain forced the teams to stop in the sixth inning Thursday night with the score 1-all.

The Cubs and Pirates aren’t scheduled to play again this season, and the game won’t be made up because it doesn’t affect postseason positioning. So instead of becoming a suspended game, the stats count and it was declared a tie – the first since Houston and Cincinnati went seven innings on June 30, 2005, before rain halted them.

In the days before stadium lighting, ties were very common. That is why you often teams playing 155 or 156 games in a 154 game season. Even with lights, rain sometimes washed out a tie game, as it did Thursday night. Those games were simply called ties, and the game was made up, as teams play to 162 decisions. A few years ago it was decided it would be better to suspend the game and finish at the next opportunity, so the tie had vanished until tonight.