Pedro Martinez has the most runs above average with 25+ starts in a season, with 79.4 in 1999.

Tony Gonsolin has the best win percentage with 20+ starts in a season, at .941 in 2022.

Since 1961, Bob Gibson has the lowest ERA with 150.0+ innings pitched in a season, with an ERA of 1.12 in 1968.

Since 1961, Pedro Martinez has the lowest WHIP with 162.0+ innings pitched in a season, with a WHIP of 0.74 in 2000.

Since 1961, Pedro Martinez has the lowest fielding-independent pitching with 162.0+ innings pitched in a season, with a FIP of 1.38 in 1999.

Since 1961, Bob Gibson has the best ERA with 162.0+ innings pitched in a season, with an ERA of 1.12 in 1968.

highest avg by a league in a season since 1940

highest era by a league in a season since 1947

highest avg by a league in a season since 1947

highest avg by a league in a season since 1930

highest era by a league in a season since 1900

highest avg by a league in a season

Walter Johnson has the lowest ERA with 300+ strikeouts in a season, with an ERA of 1.36 in 1910.

Clayton Kershaw had his fewest runs above average in a season in 2024, with 2.

Since 1900, Walter Johnson has the lowest ERA- with 300+ strikeouts in a season, with an ERA- of 42 in 1912.