How to calculate weight

[Professor1215]

In a purely hypothetical situation....

Let's say Clayton Kershaw has a .220 AVG and a .90 WHIP.

Let's say Brian Wilson and Kenley Jansen combine to have a .250 AVG and a 1.30 WHIP.

I am making the assumption that a fair weight for each pitcher is Kershaw for 6 innings and Wilson/Jansen for 3 innings. In other words, Kershaw has 6 IP of .220/.90 and Wilson/Jansen 3 innings of .250/1.30.

If I were to take an average of these pitchers for entire 9 inning game, what would the correct AVG and WHIP be for the game taking into consideration the amount of innings each one throws? I would assume it would be higher than .220 since the relief pitchers pitch worse than Kershaw.

Thanks and sorry if this does not make sense, it is hard to explain.

[mark49]

im guessing (6*.220) + (3* .250) then divide by 9 so .230 ?

[Professor1215]

Just not sure if it's that easy, haha. I hope you are right though.

[James Marques]

I think he's right.

[frongi]

that would work for whip but not for bavg. batting average would depend on the number of batters faced, and also the how often they walk. just because kershaw is projected to pitch 2/3 of the innings doesn't mean he would be projected to face 2/3 of the hitters. in fact with him being a better pitcher he is more likely to get outs at a higher rate, leading him to face less than 2/3 of the hitters.