Answer:
In real dollars, Babe Ruth's salary = $80,000 / 0.0645 (CPI 1930) = $1,240,000
Since Babe Ruth was the highest paid baseball player back then, if we compare his updated salary to Kershaw's salary, it represents only = $1,240,000 / $33,000,000 = 3.76%.
That means that most of the players' salary raise was due to other factors, not just inflation.