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.
We’ll now examine the best pitching parks for the season. Go here for a full breakdown of the best hitter parks.
Most stats are courtesy of Savant, using a three-year sample.
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
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Logan Gilbert (2.49 vs. 3.94)
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Luis Castillo (3.15 vs. 4.25)
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George Kirby (3.06 vs. 3.89)
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Bryce Miller (1.96 vs. 4.07!)
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Bryan Woo (2.47 vs. 3.29)
Mariners’ pitchers will continue to get a huge boost from their home park, but it’s a hurdle for Julio Rodríguez.
Tropicana Field has also decreased walks by 5% and increased strikeouts by 8% over the last three seasons, so the Rays’ move to a new home with Yankee Stadium’s dimensions will have major fantasy ramifications.
Petco Park has actually boosted homers (+4%) over the last three seasons, but it remains a tough place to hit overall. Nick Pivetta’s propensity to give up home runs should remain an issue with his move from Fenway Park (-2%); Pivetta allowed 20 of his 28 homers on the road last year. Still, Pivetta moves from the second-best hitter’s park to the third-best pitcher’s park according to Park Factors. Pivetta has the fifth-best K-BB% since 2023, so he looks like a top-40…