Across the 13 ballparks on the schedule, Coors Field inflates home runs the most, with a BallBet HR park factor of 1.34. Progressive Field suppresses them most at 0.92. Stadium baselines are multi-year and stable; same-day weather shifts each park's environment game to game.
Most home-run-friendly at the top. BallBet multi-year baselines relative to a neutral park.
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.
Among parks on the current schedule, Coors Field has the highest BallBet HR park factor (1.34), meaning it inflates home runs the most relative to a neutral park.
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.