Pedro Martinez fanned his most batters in a game on May 6, 2000 and on September 10, 1999, with 17 strikeouts.

Pedro Martinez fanned his most hitters in a game on May 6, 2000 and on September 10, 1999, with 17 strikeouts.

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.