I have stats and game linescores for each postseason series. This information will soon also appear on the season pages for the leagues and the teams involved in postseason play. Please note that I'm still working on this section, so some of the data is missing, but I hope to have that fixed up in a week or two. Note that there are National League pennants awarded for seasons prior to 1903 when the first World Series was played. Each league season now has an expanded leaderboard , showing the top 10 in each statistical category.
Pitchers now have a seasonal notation line as well.
This appears below their career pitching totals. For batters this is just their averages over 162 games, but you can't do this for pitchers as they aren't expected to pitch every day. So either 68 relief appearances or 34 starts count as a season. This brings dead ball pitchers into the modern age. This is really just a novelty, so I'm not going to get too hung up on the specifics.