His ERA of 2.70 at the time was the fifth best of the live - ball era at the 1,000 inning mark and the best career mark .
On May 14 , Kershaw passed the 1,000 inning mark for his career .
Kershaw 's ERA of 2.70 at the time was the fifth best of the live - ball era at the 1,000 inning mark and the best career mark .
On May 14 , Kershaw passed the 1,000 inning mark for his career .