This study ranks MLB ballparks by BallBet's home-run park factor. The table fills in as parks appear on the upcoming schedule.
Each park's park factor is BallBet's multi-year baseline for that outcome relative to a neutral park. For tonight's factors with weather layered on, see the parks board; for any single park, the ballpark pages.
The ranking fills in as parks appear on the schedule.
A park factor indexes how much a ballpark inflates or suppresses an outcome versus a neutral park. Above the neutral baseline means the park boosts home runs; below it means it suppresses them.
The stadium baseline is a multi-year figure and is stable. What changes nightly is weather — temperature and wind — which BallBet layers on top of the baseline for each game.