More Retrosheet stuff. This time, I looked at the number of times the lead-off batter got on in each game and tried to determine what effect, if any, that had on the production from the third and fourth batters.
For the purposes of this study, I defined "getting on base" as reaching via a walk or hit--something easily countable in a box score. I didn't include any times that a hitter may have reached on a fielder's choice, hit batsman, error, etc.
There's a lot of data here, so I'm splitting it up by month. April through June (conveniently the first 81 games) are included in part 1. Here are those results: