Don Newcombe threw 248 innings and went 20-5 in 1955, with an ERA of 3.20, a WHIP of 1.11. Opposing hitters hit .249 against him, and he walked 1.46 batters per 9. His fielding is listed as D+/C by the WIS database.
In 1956, Newcombe threw 282 innings, had a record of 27-7 with a 3.06 ERA and a WHIP of 0.99. Opposing batters hit only .222 against him, though he did walk 1.54 hitters per 9 innings pitched.
His ERC# is 2.44 for 1956, better than 3.14 for the previous season.
So other than the slight difference in walks per 9 innings the only difference I can find in which his number are better for 1955 than for 1956 is in strikeouts per 9 innings: 5.51 for 1955 versus 4.67 for 1956.
Is the K/9 the reason why Newcombe's services cost $8,940,624 for 1955, slightly HIGHER than the $8,922,613 for 1956, ostensibly a better season?
Otherwise I can't see why the 1955 season iteration would cost more than 1956. Any good explanations? I know that Ks are expensive, so I gather that this is the reason, but for a little less than one strikeout per game more to outweigh WHIP, OAV and the rest seems strange.