highest era in a season by a league since 1931

Denny McLain was 24.8 runs better than average in 1968.

Vida Blue was 41.4 runs better than average in 1971.

Jake Arrieta was 4.4 runs worse than average in his rookie season in 2010.

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 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