Park Factors can dramatically influence a player’s fantasy baseball value.

Left-handed batters have seen a 42% increase in home runs when hitting in Cincinnati over the last three seasons, but they’ve experienced a 23% decrease in San Francisco.

Parks can also affect strikeouts and walks — not just power. And many other factors outside of just dimensions go into whether a venue benefits hitters or pitchers, including mound height, climate, wind and even umpire accuracy due to visibility.

Getting ahead of changes for 2025 — whether they be in park structure or players changing teams — will help win your fantasy league.

The following parks are listed with the most extreme at the top, with +/- % being the difference compared to league average:

Seattle was baseball’s most extreme park last season, as T-Mobile decreased run scoring (-21%) as much as Coors Field increased it. Visibility looks like one issue, as no park boosts Whiff Rate more. Temperature and wind are also among many contributing factors to Seattle being an extreme pitcher’s park. Andrés Muñoz had the third-biggest home/road split of any pitcher since World War II last season.

Here are Seattle’s starting pitchers’ eye-opening home/road splits from last year

Logan Gilbert (2.49 vs. 3.94)

Luis Castillo (3.15 vs. 4.25)

George Kirby (3.06 vs. 3.89)