Sandy Koufax had an ERA of 1.88 when striking out 300+ batters in 1963.

Tommy Bond had an ERA of 1.68 with an FIP better than 2.00 in his rookie season in 1876.

John Smoltz fanned 37 batters in his rookie season in 1988.

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

Since 1961, Nolan Ryan has struck out the most batters in a season, with 383 strikeouts in 1973.

Since 1961, Nolan Ryan has given up the most walks in a season, with 204 allowed in 1977.

Dwight Gooden had a 1.68 FIP for the Mets in his rookie season in 1984.

Dwight Gooden had an ERA- of 74 for the Mets in his rookie season in 1984.

Matt Kilroy has struck out the most hitters by a rookie, with 513 strikeouts in 1886.

Matt Kilroy struck out the most hitters by a pitcher in his first season, with 513 strikeouts in his rookie season.

Dwight Gooden fanned 276 batters in his rookie season in 1984.

Dwight Gooden fanned 276 hitters for the Mets in his rookie season in 1984.

The Philadelphia Quakers had their fewest wins in a season in 1883, with 17 wins.

Bob Gibson has pitched the most complete games with 1 or fewer earned run in a season, with 22 complete games in 1968.

Since 1961, 4 pitchers are tied for the most complete games in a season, with 30 complete games. The first three are Catfish Hunter in 1975, Steve Carlton in 1972 and Fergie Jenkins in 1971.