Tom Seaver was 44.5 runs better than average in 1971.

Randy Johnson was 63.9 runs better than average in 2001.

Since 1920, Jacob deGrom has the best ERA- with 10+ starts in a season, with an ERA- of 27 in 2021.

Since 1920, Edinson Volquez has the highest ERA- in a season, with an ERA- of 161 in 2013.

Greg Maddux was 0.3 runs better than average in his rookie season in 1986.

Greg Maddux had a FIP of 3.89 in his rookie season in 1986.

Greg Maddux had an ERA- of 139 in his rookie season in 1986.

Since 1920, Steve Blass has the highest ERA- with 10+ starts in a season, with an ERA- of 277 in 1973.

Pedro Martinez was 28.4 runs above average for the Red Sox in 1998.

Julio Rodríguez and Shohei Ohtani are tied for the most runs on the road this season, with 45 runs.

Since 1920, Nolan Ryan has fanned the most hitters in a season, with 383 strikeouts in 1973.

Roger Clemens had his most runs above average in a season in 1997, with 66.3.

Roger Clemens was 66.3 runs above average for the Blue Jays in 1997.

Roger Clemens was 16.4 runs above average in his rookie season in 1984.

Since 1920, Cisco Carlos has the best ERA with 5+ starts in a season, with an ERA of 0.86 in his rookie season in 1967.