Kershaw is 49.6 innings behind Koufax.
To match Koufax he would have to do the following over his next 49.6 innings.
Lose 13 games
Give up 39 hits and walk 240 batters.
31 of those hits need to be HR's
Give up 96 Earned Runs, resulting in a nifty 17.12 ERA
And he'd still have more wins and strikeouts than Koufax. Keep in mind the difference of eras too. Koufax played in a pitching era and Kershaw in a hitter's era.
Same number of Cy Young Awards. Kershaw has 7 top 5 finishes in the award voting, Koufax has 4.
Maybe we tend to honor the baseball from the past more because we dig vintage baseball cards. But the numbers don't lie, Kershaw is better than the left arm of God.
https://www.baseball-reference.com/p...ershcl01.shtml
https://www.baseball-reference.com/p...oufasa01.shtml